A man takes a picture of ASCOD (Austrian Spanish Cooperation Development) armoured fighting vehicle at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

The 4x4 Tank Destroyer is pictured at the Polish Armaments Group (PGZ) stand at an international military fair in Kielce Poland September 7, 2017. REUTERS/Kacper Pempel

A man looks at a Patriot Advanced Capability (PAC-3) Missile Segment Enhancement (MSE) model by Lockheed Martin at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A man stand near a multipurpose combat helicopter W-3PL Gluszec by PZL Swidnik a Leonardo Helicopters company at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A man looks at a Patriot Advanced Capability (PAC-3) Missile Segment Enhancement (MSE) model by Lockheed Martin at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A man looks at a ASCOD (Austrian Spanish Cooperation Development) armoured fighting vehicle at an international military fair in Kielce, Poland, September 7, 2017. REUTERS/Kacper Pempel

People pass the U.S. defense company Raytheon stand at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A man holds Grot B 10 FB-M1 subcarbine in bullpup configuration by Fabryka Broni 'Lucznik', part of the Polish Armaments Group (PGZ), at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

People stand near a AW101 military helicopter at PZL Swidnik, a Leonardo Helicopters company stand, at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A man takes a picture near a AW101 military helicopter at PZL Swidnik, a Leonardo Helicopters company stand, at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

U.S. soldiers present a AH-64D Apache military helicopter by Boeing at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

People stand near a AW101 military helicopter at PZL Swidnik, a Leonardo Helicopters company stand, at an international military fair in Kielce, Poland, September 7, 2017. REUTERS/Kacper Pempel

People stand near a "Black Hawk" military helicopter by PZL Mielec, a Sikorsky Aircraft Company, at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A man holds a M96 Mini Beryl subcarbine by Fabryka Broni "Lucznik", part of the Polish Armaments Group (PGZ), at an international military fair in Kielce, Poland, September 7, 2017. REUTERS/Kacper Pempel

A man holds a M96 Mini-Beryl sub-carbine by Fabryka Broni 'Lucznik', part of the Polish Armaments Group (PGZ), at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

Logo of the U.S. defense company Raytheon is pictured at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

A PT-91M2 tank by Bumar, part of the Polish Armaments Group (PGZ), is pictured at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

People look at a military AW101 helicopter by Leonardo at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

U.S. soldier presents a military AH-64D Apache helicopter by Boeing at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

People stand near a military 'Black Hawk' helicopter by PZL Mielec company at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

Airbus Helicopters CEO Guillaume Faury stands near a multi-role military helicopter EC 725 by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel/File Photo

A soldier takes a picture with a multi-role military helicopter AW149 by AugustaWestland at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel/File Photo

People look at a multi-role military helicopter EC 725 by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel/File Photo

Poland's Deputy Prime Minister Janusz Piechocinski (C) walks near a multi-role military helicopter EC 725 by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel/File Photo

A multi-role military helicopter EC 725 by Airbus Helicopters is pictured at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. REUTERS/Kacper Pempel/File Photo

The Cockerill XC-8 105 hp low-weight concept-turret is seen on an armored modular vehicle at the stand of Huta Stalowa Wola (HSW), part of the Polish Armaments Group (PGZ), during an international military fair in Kielce, southern Poland September 2, 2014. Poland on Wednesday brought small defence manufacturers into a consortium big enough to bid, alongside foreign majors, for a share of the country's $40 billion military modernisation pot. The PGZ, set to comprise over 30 companies ranging from a shipyard to a high-tech graphene manufacturer, will allow the country's fragmented industry to compete for state tenders against large foreign companies. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS)

A man cleans the floor near an Armored Modular Vehicle 'Rosomak' at the Polish Arms Group (PGZ) stand at an international military fair in Kielce, southern Poland September 2, 2014. Poland on Wednesday brought small defence manufacturers into a consortium big enough to bid, alongside foreign majors, for a share of the country's $40 billion military modernisation pot. The PGZ, set to comprise over 30 companies ranging from a shipyard to a high-tech graphene manufacturer, will allow the country's fragmented industry to compete for state tenders against large foreign companies. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS)

A multi-role military helicopter AW149 by AugustaWestland is seen through the military utilities of multi-role military helicopter Airbus Helicopters EC 725 at an international military fair in Kielce, southern Poland September 2, 2014. Both companies are competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

People take a look at a multi-role military helicopter S70i Black Hawk by Sikorski Polish Manufacture PZL Mielec at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS TRANSPORT)

Soldiers present an anti-missile system SAMP/T by Thales at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS)

Soldiers present anti-missile system SAMP/T by Thales at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS)

Military combat helicopter Tiger by Airbus Helicopters is seen at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

People take a look at military combat helicopter Tiger by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

People take a look at military combat helicopter Tiger by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS TRANSPORT)

People take a look at a military combat helicopter Tiger by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS TRANSPORT)

A multi-role military helicopter AW149 by AugustaWestland is seen through multi-role military helicopter Airbus Helicopters EC 725 at an international military fair in Kielce, southern Poland September 2, 2014. Both companies are competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS TRANSPORT)

People look at a multi-role military helicopter EC 725 by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

A multi-role military helicopter EC 725 by Airbus Helicopters is pictured at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

Poland's Deputy Prime Minister Janusz Piechocinski (C) walks near a multi-role military helicopter EC 725 by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY POLITICS TRANSPORT BUSINESS)

A soldier takes a picture with a multi-role military helicopter AW149 by AugustaWestland at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

A multi-role military helicopter AW149 manufactured by AugustaWestland is exhibited at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

A multi-role military helicopter AW149 by AugustaWestland is exhibited at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT BUSINESS)

Airbus Helicopters CEO Guillaume Faury stands near a multi-role military helicopter EC 725 by Airbus Helicopters at an international military fair in Kielce, southern Poland September 2, 2014. The company is competing to supply Poland with helicopters in the ongoing army modernisation programme. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY BUSINESS TRANSPORT)

Poland's Deputy Prime Minister Janusz Piechocinski (C) listens to PZL Swidnik CEO Mieczyslaw Majewski (L) as they stand next to a multi-role military helicopter AW149 by AugustaWestland at an international military fair in Kielce, southern Poland September 2, 2014. Picture taken on September 2, 2014. REUTERS/Kacper Pempel (POLAND - Tags: MILITARY TRANSPORT POLITICS)

A vendor holds a bust of the late Pope John Paul II at a shop in Kielce, southern Poland April 16, 2014. Two giants of Roman Catholicism in the 20th century will become saints on April 27, 2014 at an unprecedented twin canonisation that has aroused both joy and controversy in the 1.2 billion-member Church. Pope John XXIII, who reigned from 1958 to 1963 and called the modernising Second Vatican Council, and Pope John Paul II, who reigned for nearly 27 years before his death in 2005 and whose trips around the world made him the most visible pope in history, will be declared saints by Pope Francis. Picture taken April 16, 2014. REUTERS/Kacper Pempel (POLAND - Tags: RELIGION SOCIETY TPX IMAGES OF THE DAY)

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Poland's Euzebiusz Smolatrek (C) scores against San Marino during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Euzebiusz Smolarek runs after the ball during their World Cup 2010 qualifying soccer match against San Marino in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Ireneusz Jelen (11) celebrates after scoring as San Marino's Alessandro Della Valle (6), goalkeaper Federico Valentini and Matteo Andreini react during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Referee shows the yellow card to San Marino's Alessandro Della Valle (R) during the 2010 World Cup qualifying soccer match between Poland and San Marino in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)

San Marino's Federico Valentini (L) reacts as Poland's Rafal Boguski celebrates scoring during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Euzebiusz Smolarek celebrates after scoring against San Marino during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's players celebrate after scoring against San Marino during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Rafal Boguski celebrates after scoring his second goal during their World Cup 2010 qualifying soccer match against San Marino in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland players celebrate a goal against San Marino during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

San Marino's Danilo Ezequiel Rinaldi is challenged by Poland's Marcin Wasilewski during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Roger Guerreiro (R) fights for a ball with San Marino's Simone Bacciocchi during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009.REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Rafal Boguski (9) shoots to score as San Marino's Davide Simoncini (5) and Alessandro Della Valle try to defend during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's Roger Guerreiro, Rafal Boguski and Euzebiusz Smolarek celebrate their second goal against San Marino during their World Cup 2010 qualifying soccer match in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)

Poland's national soccer team coach Leo Beenhakker waits for the start of their World Cup 2010 qualifying soccer match against San Marino in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER HEADSHOT)

Poland's national soccer team coach Leo Beenhakker kicks the ball before their World Cup 2010 qualifying soccer match against San Marino in Kielce April 1, 2009. REUTERS/Peter Andrews (POLAND SPORT SOCCER)