Colonel Mykola Danyliuk, representer of the Central Scientific-Military department of the General Staff, points at a dud warhead imitating a nuclear part of a Kh-55SM strategic cruise missile, which was used by Russian troops during a recent missile attack, during a news conference Kyiv, Ukraine December 1, 2022. REUTERS/Viacheslav Ratynskyi 

Members of the Ukrainian National Guard look at a dud warhead imitating a nuclear part of a Kh-55SM strategic cruise missile, which was used by Russian troops during a recent missile attack, during a news conference Kyiv, Ukraine December 1, 2022. REUTERS/Viacheslav Ratynskyi 

A member of the Ukrainian National Guard takes a picture of a dud warhead imitating a nuclear part of a Kh-55SM strategic cruise missile, which was used by Russian troops during a recent missile attack, during a news conference Kyiv, Ukraine December 1, 2022. REUTERS/Viacheslav Ratynskyi 

A dud warhead imitating a nuclear part of a Kh-55SM strategic cruise missile, which was used by Russian troops during a recent missile attack, is seen during a news conference Kyiv, Ukraine December 1, 2022. REUTERS/Viacheslav Ratynskyi 

The world’s combined inventory of nuclear warheads stands at 12,700 across nine countries as of early 2022, down from a Cold War peak of approximately 70,300 in 1986. 

Charts nuclear warhead stockpile of U.S., Russia, China, and others. 

Interactive graphic package showing various aspects of North Korea's nuclear program. Includes map of facilities, timeline of missile and nuclear tests, map of missile ranges as well as warhead diagrams. 

NUCLEAR-ARMS/CTBT - Map showing nuclear-armed states with their estimated warhead inventories. (SIN08) 

People throw rose petals on the grave of former Indian President A.P.J. Abdul Kalam during his funeral ceremony in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

Police try to control crowd as they attend the funeral ceremony of former President A. P. J. Abdul Kalam in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

Indian Prime Minister Narendra Modi gestures after placing a wreath on the body of former President A.P.J. Abdul Kalam, wrapped with the national flag, during the funeral ceremony in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

People climb trees as they watch the funeral ceremony of former Indian President A.P.J. Abdul Kalam in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

People take pictures of a portrait of former Indian President A.P.J. Abdul Kalam at his school in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

People shout slogans as they attend the funeral ceremony of former Indian President A.P.J. Abdul Kalam in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

People try to catch a water bottle thrown by policemen during the funeral ceremony of former Indian President A.P.J. Abdul Kalam in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

People shout slogans as they attend the funeral ceremony of former Indian President A.P.J. Abdul Kalam in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

Indian Prime Minister Narendra Modi gestures after placing a wreath on the body of former President A.P.J. Abdul Kalam, wrapped with the national flag, during the funeral ceremony in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

Indian Prime Minister Narendra Modi gestures after placing a wreath on the body of former President A.P.J. Abdul Kalam, wrapped with the national flag, during the funeral ceremony in Rameswaram, India, July 30, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

School children attend a prayer ceremony for the former Indian President A. P. J. Abdul Kalam, in Agartala, India, July 29, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Jayanta Dey 

Indian soldiers escort a gun carriage carrying the body of former Indian President A. P. J. Abdul Kalam, wrapped with the national flag, outside Kalam's residence in New Delhi, India, July 29, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Anindito Mukherjee 

Teachers and schoolchildren hold a portrait of the former Indian President A. P. J. Abdul Kalam during a prayer ceremony in Agartala, India, July 29, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Jayanta Dey 

A student holds a portrait of former Indian President A. P. J. Abdul Kalam during a candle light march in Mumbai, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui 

A student holds a portrait of former Indian President A. P. J. Abdul Kalam during a candle light march in Mumbai, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY

The Indian national flag flies at half mast on the dome of India's presidential palace Rashtrapati Bhavan after the death of former Indian President A. P. J. Abdul Kalam, in New Delhi, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Anindito Mukherjee 

School girls light candles and hold portraits of former Indian President A. P. J. Abdul Kalam during a prayer ceremony in Amritsar, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Munish Sharma 

School girls hold candles and portraits of former Indian President A. P. J. Abdul Kalam during a prayer ceremony in Amritsar, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Munish Sharma 

Indian soldiers use their mobile phones to take pictures of the body of former Indian President A. P. J. Abdul Kalam, wrapped with the national flag, outside Kalam's residence in New Delhi, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Anindito Mukherjee 

A traffic policeman directs the way for a vehicle carrying the body of former Indian President A. P. J. Abdul Kalam, wrapped with the national flag, outside Kalam's residence in New Delhi, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Anindito Mukherjee 

Indian soldiers march before the arrival of the body of former Indian President A. P. J. Abdul Kalam, outside his residence in New Delhi, India, July 28, 2015. Kalam, considered the father of the country's missile programme, died on Monday in hospital at the age of 83, a doctor said. Popularly known as "Missile Man," Kalam led the scientific team that developed missiles able to carry India's nuclear warheads. He became a national folk hero after helping oversee nuclear tests in 1998 that solidified India's status as a nuclear weapons state. REUTERS/Anindito Mukherjee 

USA DEFENSE/NUCLEAR - Graphic showing world's nuclear warhead stockpile since World War Two. U.S. is set to cut nuclear launchers under 2010 treaty with Russia. (SN05) 

RUSSIA-MISSILE/WARHEADS - Chart showing global nuclear arsenals since World War Two 

German Chancellor Angela Merkel (L) and U.S. President Barack Obama leave after delivering their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS) 

OBAMA-BERLIN/NUCLEAR - Charts showing global nuclear arsenals since World War Two and how reduction treaties have lowered the number of warheads. (SIN02) 

U.S. President Barack Obama speaks from behind a bulletproof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

U.S. President Barack Obama chats with German Chancellor Angela Merkel next to Berlin Mayor Klaus Wowereit (L) after their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

U.S. President Barack Obama speaks from behind a bulletproof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel makes a speech at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel (2R) and Berlin Mayor Klaus Wowereit (R) listen to the speech of U.S. President Barack Obama (L) at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel, U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (L) leave after delivering their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel embraces U.S. President Barack Obama after their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel embraces U.S. President Barack Obama after their speeches next to Berlin Mayor Klaus Wowereit (R) at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel shakes hands with U.S. President Barack Obama after their speeches next to Berlin Mayor Klaus Wowereit (R) at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel, U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (L) leave after delivering their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel, U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (L) leave after delivering their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel, U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (L) leave after delivering their speeches at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel, U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (R) wave as they arrive at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel (2R) and Berlin Mayor Klaus Wowereit (R) listen to the speech of U.S. President Barack Obama (L) at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

U.S. President Barack Obama (L) waves in front of German Chancellor Angela Merkel and Berlin Mayor Klaus Wowereit at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel makes a speech as U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (R) listen at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

Berliners watch on a tv set the speeches of U.S. President Barack Obama, German Chancellor Angela Merkel and Berlin Mayor Klaus Wowereit at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS)

A holds up a welcoming placard as she watches U.S. President Barack Obama, German Chancellor Angela Merkel and Berlin Mayor Klaus Wowereit at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

U.S. President Barack Obama speaks from behind a bulletproof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

U.S. President Barack Obama kisses German Chancellor Angela Merkel as Berlin Mayor Klaus Wowereit (R) applauds at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Wolfgang Rattay (GERMANY - Tags: POLITICS)

U.S. President Barack Obama kisses German Chancellor Angela Merkel as Berlin Mayor Klaus Wowereit (R) applauds at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

U.S. President Barack Obama speaks from behind a bulletproof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel and Berlin Mayor Klaus Wowereit (C) listen to the speech of U.S. President Barack Obama (R) from behind a bulletproof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel stands with U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (R) behind a bullet proof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)

German Chancellor Angela Merkel stands with U.S. President Barack Obama and Berlin Mayor Klaus Wowereit (R) behind a bullet proof glass at the Brandenburg Gate in Berlin, June 19, 2013. U.S. President Barack Obama will unveil plans for a sharp reduction in nuclear warheads in a landmark speech at the Brandenburg Gate on Wednesday that comes 50 years after John F. Kennedy declared "Ich bin ein Berliner" in a defiant Cold War address. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS)