New York City Mayor Michael Bloomberg (L) and Vietnam's Prime Minister Nguyen Tan Dung pose for a photo at the Government Office in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tabacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT HEALTH) 

New York City Mayor Michael Bloomberg (C) stands with students during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

Students wearing helmets and road signs perform for New York City Mayor Michael Bloomberg during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

Students wearing helmets wait for the arrival of New York City Mayor Michael Bloomberg during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

New York City Mayor Michael Bloomberg attends an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH HEADSHOT) 

New York City Mayor Michael Bloomberg (C) attends an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

New York City Mayor Michael Bloomberg (front R) waves to students as he arrives at an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

New York City Mayor Michael Bloomberg (top) teaches student Anh Thu to put on a helmet during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

New York City Mayor Michael Bloomberg helps a student put on a helmet during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

New York City Mayor Michael Bloomberg (C) stands with students during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

New York City Mayor Michael Bloomberg (C) helps a pupil put on a helmet during an event to give children motorcycle helmets at a school in Hanoi March 23, 2012. Bloomberg arrived in Vietnam on Friday to visit programmes supported by his charitable foundation Bloomberg Philanthropies, including tobacco and road safety issues, according to a press release. REUTERS/Kham (VIETNAM - Tags: POLITICS SOCIETY TRANSPORT BUSINESS HEALTH) 

Sweden's Lisa Dahlkvist (17) tries to score through the block of North Korea's Hong Myong Hui during their Women's World Cup soccer match in Augsburg July 2, 2011. REUTERS/Michael Dalder (GERMANY - Tags: SPORT SOCCER WORLD CUP) 

North Korea players pose before the Women's World Cup soccer match between Sweden and North Korea in Augsburg July 2, 2011. (Back row L-R) Jo Yun Mi, Yun Hyon Hi, Ri Ye Gyong, Ra Un Sim, Song Jong Sun and Hong Myong Hui. (Front row L-R) Jong Pok Sim, Jon Myong Hwa, Ri Un Hyang, Ho Un Byol and Kim Su Gyong. REUTERS/Michael Dalder (GERMANY - Tags: SPORT SOCCER WORLD CUP) 

General Nguyen Van Cuong (L) leads the way for Australia's Governor General Quentin Bryce (R) and her husband Michael (C) to a wreath-laying ceremony at the mausoleum of the Vietnamese late revolutionary leader Ho Chi Minh in Hanoi May 10, 2011. Governor General Bryce is in Hanoi with her husband for a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (center L) and Vietnam's Communist Party General Secretary and National Assembly's Chairman Nguyen Phu Trong (center R) talk during a meeting at the Party's headquarters in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (L) shakes hands with Vietnam's Communist Party General Secretary and National Assembly's Chairman Nguyen Phu Trong at the Party's headquarters in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (L) poses for a photo with Vietnam's Communist Party General Secretary and National Assembly's Chairman Nguyen Phu Trong at the Party's headquarters in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (L) and Vietnam's Prime Minister Nguyen Tan Dung (R) talk during a meeting at the Government Office in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (L) is greeted by Vietnam's Prime Minister Nguyen Tan Dung at the Government Office in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Members of the guard of honour stand in attention during a welcoming ceremony for Australia's Governor General Quentin Bryce at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS MILITARY) 

Soldiers stand guard at the Presidential Palace in Hanoi May 9, 2011. Australia's Governor General Quentin Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS MILITARY) 

Australia's Governor General Quentin Bryce attends a meeting with Vietnam's President Nguyen Minh Triet at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS HEADSHOT) 

Australia's Governor General Quentin Bryce (2nd R), her husband Michael Bryce (R), Vietnam's President Nguyen Minh Triet (2nd L) and Triet's wife Tran Thi Kim Chi pose for a picture at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (L on stage) and Vietnam's President Nguyen Minh Triet (R on stage) listen to their national anthems during a welcoming ceremony at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce reviews the guard of honour during a welcoming ceremony at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (L) and Vietnam's President Nguyen Minh Triet talk in front of a statue of the late Vietnamese revolutionary leader Ho Chi Minh at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (R) and Vietnam's President Nguyen Minh Triet review the guard of honour during a welcoming ceremony at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Australia's Governor General Quentin Bryce (R) and Vietnam's President Nguyen Minh Triet pose for a picture at the Presidential Palace in Hanoi May 9, 2011. Governor General Bryce and her husband Michael are on a visit to Vietnam from May 8 to 14. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Clothes from musicians Andy Hui, Katy Perry and Shakira rest on mannequins inside Hard Rock's Rock Vault in Orlando, Florida April 21, 2011. The frothy white wedding dress worn by Madonna in her music video "Like a Virgin" and Michael Jackson's red leather jacket from the music video "Beat It", along with Justin Bieber's skateboard and Ray Charles' Braille Playboy magazine, are among 40 pieces of rock memorabilia that will go on tour in the United States beginning on May 18 to celebrate the Hard Rock Cafe's 40th anniversary. Picture taken April 21. To match Reuters Life! MEMORABILIA-ROCK/ REUTERS/Scott Audette (UNITED STATES - Tags: ANNIVERSARY SOCIETY) 

U.S. Defense Secretary Robert Gates (L) arrives for a meeting with China's Defence Minister Liang Guanglie at an inaugural meeting of Asia-Pacific defence ministers in Hanoi October 11, 2010. Liang on Monday formally invited Gates to China in another step towards normalising relations between the two nations' militaries. The man on the right of the photo is U.S. Ambassador to Vietnam Michael Michalak. REUTERS/Kham (VIETNAM - Tags: POLITICS MILITARY) 

A member of the Hanoi Michael Jackson fan club performs during a tribute performance to the late entertainer in Hanoi June 24, 2010. Friday marks the first anniversary of Jackson's death. REUTERS/Kham (VIETNAM - Tags: ENTERTAINMENT SOCIETY ANNIVERSARY) 

Members of the Hanoi Michael Jackson fan club perform during a tribute performance to the late entertainer in Hanoi June 24, 2010. Friday marks the first anniversary of Jackson's death. REUTERS/Kham (VIETNAM - Tags: ENTERTAINMENT SOCIETY ANNIVERSARY) 

Members of the Hanoi Michael Jackson fan club perform during a tribute performance to the late entertainer in Hanoi June 24, 2010. Friday marks the first anniversary of Jackson's death. REUTERS/Kham (VIETNAM - Tags: ANNIVERSARY ENTERTAINMENT SOCIETY) 

U.S. Ambassador to Vietnam Michael Michalak speaks with the media after a signing ceremony in Hanoi March 30, 2010. Vietnam and the U.S. on Tuesday signed a Memorandum of Understanding regarding cooperation in the nuclear energy field which could allow U.S. companies to provide equipment and technology for Vietnam, Michalak said in Hanoi. REUTERS/Kham (VIETNAM - Tags: ENERGY HEADSHOT POLITICS BUSINESS) 

Vietnam's Vice Minister of Science and Technology Le Dinh Tien (L) chats with U.S. Ambassador to Vietnam Michael Michalak after a signing ceremony in Hanoi March 30, 2010. Vietnam and the U.S. on Tuesday signed a Memorandum of Understanding regarding cooperation in the nuclear energy field which could allow U.S. companies to provide equipment and technology for Vietnam, Michalak said in Hanoi. REUTERS/Kham (VIETNAM - Tags: ENERGY POLITICS BUSINESS) 

Vietnam's Vice Minister of Science and Technology Le Dinh Tien (L) poses for a photo with U.S. Ambassador to Vietnam Michael Michalak, after a signing ceremony in Hanoi March 30, 2010. Vietnam and the U.S. on Tuesday signed a Memorandum of Understanding regarding cooperation in the nuclear energy field which could allow U.S. companies to provide equipment and technology for Vietnam, Michalak said in Hanoi. REUTERS/Kham (VIETNAM - Tags: ENERGY POLITICS BUSINESS) 

Vietnam's Vice Minister of Science and Technology Le Dinh Tien (L) shakes hands with U.S. Ambassador to Vietnam Michael Michalak, at a signing ceremony in Hanoi March 30, 2010. Vietnam and the U.S. on Tuesday signed a Memorandum of Understanding regarding cooperation in the nuclear energy field which could allow U.S. companies to provide equipment and technology for Vietnam, Michalak said in Hanoi. REUTERS/Kham (VIETNAM - Tags: ENERGY POLITICS BUSINESS) 

Vietnam's Deputy Minister of Foreign Affairs Nguyen Thanh Son (R) meets the U.S. Representatives Eni Faleomavaega of American Samoa (2nd R), Joseph Cao Quang Anh of Louisiana (2nd L) and Michael Honda of California at the Government Guest House in Hanoi January 5, 2010. Joseph Cao is the first Vietnamese original to be a member of the U.S. Congress. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Vietnam's Deputy Minister of Foreign Affairs Nguyen Thanh Son (L) meets the U.S. Representatives Eni Faleomavaega of American Samoa (2nd L), Michael Honda of California (C) and Joseph Cao Quang Anh of Louisiana (2nd R) at the Government Guest House in Hanoi January 5, 2010. Joseph Cao is the first Vietnamese original to be a member of the U.S. Congress. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Vietnam's Deputy Minister of Foreign Affairs Nguyen Thanh Son (L) meets the U.S. Representatives Eni Faleomavaega of American Samoa (2nd L), Joseph Cao Quang Anh of Louisiana (2nd R), Michael Honda of California (R) and U.S. Ambassador to Vietnam Michael Michalak (C) at the Government Guest House in Hanoi January 5, 2010. Joseph Cao is the first Vietnamese original to be a member of the U.S. Congress. REUTERS/Kham (VIETNAM - Tags: POLITICS) 

Birmingham City owner Carson Yeung (C) poses with his Board of Directors, (L-R) Mike Wiseman, Vice President; Sammy Yu, Vice Chairman of football; Vicu Hui, Chairman; Carson Yeung; Peter Pannu, Executive; Michael Dunford, Chief Executive Officer and Warren Ko, legal advisor, during a news conference at St Andrew's in Birmingham, central England October 15, 2009. REUTERS/Darren Staples (BRITAIN SPORT SOCCER) 

U.S. ambassador to Vietnam Michael Michalak (2nd R) and MIA Vietnam director Nguyen Van Dao (C) attend a repatriation ceremony for remains of persons who are believed to be U.S. servicemen missing in action during the Vietnam War at Hanoi's Noi Bai international airport September 12, 2009. Two cases of human remains were transported on Saturday from Hanoi to the U.S. for forensic testing. REUTERS/Kham (VIETNAM POLITICS MILITARY) 

U.S. ambassador to Vietnam Michael Michalak speaks with media after a repatriation ceremony for remains of persons who are believed to be U.S. servicemen missing in action during the Vietnam War, at Hanoi's Noi Bai international airport September 12, 2009. Two cases of human remains were transported on Saturday from Hanoi to the U.S. for forensic testing. REUTERS/Kham (VIETNAM POLITICS MILITARY) 

Relatives and comrades attend a repatriation ceremony for the remains of Royal Australian Air Force pilot Robert Charles Carver (L) and flying officer Michael Patrick Herbert at Hanoi's Noi Bai airport August 30, 2009. Attendees (L-R) are Carver's niece Nicole Carver, nephew Adam Carver, sister in-law Susanna Carver, Parliamentary Secretary Dr. Mike Kelly and Air Marshal Mark Binskin. Herbert's brother Shane Herbert stands on the right. Carver and Herbert disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Shane Herbert kneels next to the coffin containing the remains of his brother, Royal Australian Air Force flying officer Michael Patrick Herbert, during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Herbert and pilot officer Robert Charles Carver disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT IMAGES OF THE DAY) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force pilot Robert Charles Carver past his family members; niece Nicole Carver (L), nephew Adam Carver (2nd L), sister in-law Susanna Carver (3rd L) and Parliamentary Secretary Dr. Mike Kelly during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Carver and flying officer Michael Patrick Herbert disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force flying officer Michael Patrick Herbert during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Herbert and pilot officer Robert Charles Carver disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force flying officer Michael Patrick Herbert during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Herbert and pilot officer Robert Charles Carver disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force pilot Robert Charles Carver during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Carver and flying officer Michael Patrick Herbert disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force pilot Robert Charles Carver during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Carver and flying officer Michael Patrick Herbert disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force pilot Robert Charles Carver during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Carver and flying officer Michael Patrick Herbert disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Military pallbearers and former comrades carry a coffin containing the remains of Royal Australian Air Force flying officer Michael Patrick Herbert during a repatriation ceremony at Hanoi's Noi Bai airport August 30, 2009. Herbert and pilot officer Robert Charles Carver disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

A photograph of Royal Australian Air Force flying officer Michael Patrick Herbert sits on a table next to his medals before a repatriation ceremony for his remains at Hanoi's Noi Bai airport August 30, 2009. Herbert and pilot officer Robert Charles Carver disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

A photograph of Royal Australian Air Force pilot Robert Charles Carver sits on a table next to his medals before a repatriation ceremony for his remains at Hanoi's Noi Bai airport August 30, 2009. Carver and flying officer Michael Patrick Herbert disappeared during a bombing mission over Vietnam in 1970. REUTERS/Kham (VIETNAM POLITICS OBITUARY MILITARY CONFLICT) 

Ana Carrascosa of Spain celebrates her victory over Jo Song Hui of North Korea in the under 52 kg women's match of the World Judo Championships in Rotterdam August 27, 2009. REUTERS/Michael Kooren (NETHERLANDS SPORT JUDO) 

Vietnam's Deputy Minister of Defense Senior Lieutenant General Nguyen Huy Hieu (R) shakes hands with U.S. Ambassador to Vietnam Michael Michalak at the Defense Ministry Guest House in Hanoi July 31, 2009. On Friday, the agency within the Vietnamese military that oversees clearance of unexploded ordnance and the Vietnam Veterans of America Foundation released a report detailing the problem in six central provinces that saw some of the heaviest fighting during the decade-long war with the United States. At the current pace, it will take 300 years and more than $10 billion to clear Vietnam of left-over bombs, shells and mines, a humanitarian and economic scourge in parts of the country, a senior military officer said on Friday. REUTERS/Kham (VIETNAM MILITARY CONFLICT POLITICS) 

Members of Michael Jackson's Fan Club in Vietnam mourn around his portrait during a memorial tribute at a cafe in Hanoi June 27, 2009. Jackson's death dominated news bulletins, radio airwaves and websites the world over on Friday as tributes poured in for a man called the "King of Pop" and "natural heir to Elvis." The 50-year-old, whose towering legacy was tarnished by often bizarre behavior and sex scandals, was pronounced dead on Thursday in Los Angeles after going into cardiac arrest. REUTERS/Kham (VIETNAM ENTERTAINMENT OBITUARY) 

Members of Michael Jackson's Fan Club in Vietnam mourn around his portrait during a memorial tribute at a cafe in Hanoi June 27, 2009. Jackson's death dominated news bulletins, radio airwaves and websites the world over on Friday as tributes poured in for a man called the "King of Pop" and "natural heir to Elvis." The 50-year-old, whose towering legacy was tarnished by often bizarre behavior and sex scandals, was pronounced dead on Thursday in Los Angeles after going into cardiac arrest. REUTERS/Kham (VIETNAM ENTERTAINMENT OBITUARY IMAGES OF THE DAY) 

A member of Michael Jackson's Fan Club in Vietnam poses with a portrait during a memorial tribute at a cafe in Hanoi June 27, 2009. Jackson's death dominated news bulletins, radio airwaves and websites the world over on Friday as tributes poured in for a man called the "King of Pop" and "natural heir to Elvis." The 50-year-old, whose towering legacy was tarnished by often bizarre behavior and sex scandals, was pronounced dead on Thursday in Los Angeles after going into cardiac arrest. REUTERS/Kham (VIETNAM ENTERTAINMENT OBITUARY) 

U.S. Senator John McCain (R) of Arizona introduces Senator Amy Klobuchar of Minnestosa (2nd R), Senator Lindsey Graham of South Carolina (2nd L) and U.S. Ambassador to Vietnam Michael Michalak, to a bed used by U.S. prisoners in the Vietnam War, during their visit to Hoa Lo prison in Hanoi April 8, 2009. McCain was jailed in Hoa Lo prison from 1967 to 1973 during the war. REUTERS/Kham (VIETNAM POLITICS)