Palestinian schoolgirls sit in a classroom at UNRWA's (UN Relief and Works Agency) primary school in Beit Lahia in the northern Gaza Strip on January 24, 2009. Some 200,000 Gaza children returned to school for the first time since Israel's offensive, many having lost family members, their home and their sense of security. The main UNRWA centre and several schools were destroyed by Israeli bombing during the 22-day war.