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 December 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 December 2, 2011. REUTERS/Peter Andrews (POLAND - Tags: SPORT SOCCER) (EURO 2012-SECURITY)