A woman hostage walks behind a hijacked bus after being set free in the Gerakas suburb some 25 kilometres north of Athens. A woman hostage walks away from a hijacked bus as police special forces watch her movement at Gerakas suburb some 25 kilometres north of Athens December 15, 2004. Foreign gunmen who seized a Greek bus on Wednesday allowed four of their 26 hostages to leave the vehicle, Reuters correspondents at the scene said. Pictures of the month December 2004 REUTERS/Yiorgos Karahalis pictures of the month December 2004