A sniper of Poland's Elite Special Forces Unit (GROM) takes part in a joint training with Poland's Antiterrorist Police Force and Railroad Defence Guard involving a hostage rescue situation on a train at an undisclosed location in northern Poland prior to Euro 2012 soccer championships Dec 2, 2011. Poland is investing heavily in security for next year's European football championship despite downgrading the number of visitors it expects. Commandoes have been simulating a multiple hostage situation in case criminals target the world's second largest football tournament, which is being co-hosted with Ukraine next June. Picture taken Dec 2, 2011.[Photo/Agencies]

Poland's Elite Special Forces Unit GROM in conjunction with Poland's Antiterrorist Police Force and Railroad Defence Guard take part in an exercise involving a hostage rescue situation on a train at undisclosed location in northern Poland prior to Euro 2012 soccer championships Dec 1, 2011. [Photo/Agencies]

Poland's Antiterrorist Police Force troopers storm a train during a joint training with the Elite Special Forces Unit GROM and the Railroad Defence Guard involving a train hostage rescue situation at an undisclosed location in northern Poland ahead of the Euro 2012 soccer championships Dec 1, 2011. [Photo/Agencies]

A trooper of Poland's Antiterrorist Police Force storms a train cabin during a joint training with the Elite Special Forces Unit GROM and the Railroad Defence Guard involving a train hostage rescue situation at an undisclosed location in northern Poland ahead of the Euro 2012 soccer championships Dec 1, 2011. [Photo/Agnecies]

A trooper of Poland's Antiterrorist Police Force storms a train cabin during a joint training with the Elite Special Forces Unit GROM and the Railroad Defence Guard involving a train hostage rescue situation at an undisclosed location in northern Poland ahead of the Euro 2012 soccer championships Dec 1, 2011. [Photo/Agencies]

Poland's Elite Special Forces Unit GROM in conjunction with Poland's Antiterrorist Police Force and Railroad Defence Guard take part in an exercise involving a hostage rescue situation on a train at undisclosed location in northern Poland prior to Euro 2012 soccer championships Dec 1, 2011. [Photo/Agencies]

Members of Poland's Antiterrorist Police Force, in conjunction with the Elite Special Forces Unit, GROM and Railroad Defence Guard, take part in an exercise involving a hostage rescue situation on a train, in northern Poland Dec 2, 2011. [Photo/Agencies]

Members of Poland's Antiterrorist Police Force, in conjunction with the Elite Special Forces Unit, GROM and Railroad Defence Guard, take part in an exercise involving a hostage rescue situation on a train, in northern Poland Dec 2, 2011. [Photo/Agencies]

Members of Poland's Antiterrorist Police Force, in conjunction with the Elite Special Forces Unit, GROM and Railroad Defence Guard, take part in an exercise involving a hostage rescue situation on a train, in northern Poland Dec 2, 2011. [Photo/Agencies]

A member of Poland's Elite Special Forces Unit, GROM, in conjunction with Poland's Antiterrorist Police Force and Railroad Defence Guard, takes part in an exercise involving a hostage rescue situation on a train, in northern Poland Dec 1, 2011. [Photo/Agencies]

Members of Poland's Anti Terrorist Police Unit (BOA) practice target shooting from helicopters at a location in Northern Poland Nov 29, 2011. [Photo/Agencies] 

Divers from Poland's Elite Special Forces Unit, GROM, are hoisted from the waters of the Baltic Sea Nov 29, 2011. [Photo/Agencies]

Members of Poland's Elite Special Forces Unit, GROM, conduct a fast rope descent onto a ship in the Baltic Sea during an exercise involving different hostage rescue situations, in northern Poland Nov 29, 2011. [Photo/Agencies]

Members of Poland's Anti Terrorist Police Unit (BOA) are hoisted from a ship in northern Poland Nov 29, 2011. [Photo/Agencies]