Palestinians dance and wave various flags, at the Bourj al-Barajneh Palestinian refugee camp, in Beirut, Lebanon, Tuesday Oct. 18, 2011.  The group gathered to celebrate the release of hundreds of Palestinian detainees from Israeli jails in a prisoners exchange with Israeli soldier Gilad Schalit,  between the Palestinian militant group Hamas and Israel. ( AP Photo/Ahmad Omar)

Photo by: Ahmad Omar

Palestinians dance and wave various flags, at the Bourj al-Barajneh Palestinian refugee camp, in Beirut, Lebanon, Tuesday Oct. 18, 2011. The group gathered to celebrate the release of hundreds of Palestinian detainees from Israeli jails in a prisoners exchange with Israeli soldier Gilad Schalit, between the Palestinian militant group Hamas and Israel. ( AP Photo/Ahmad Omar)