A damaged window on a bus is seen at the scene of an explosion in Jerusalem in this still image taken from video March 23, 2011. A bomb exploded near the bus on Wednesday, injuring dozens, police said. [Photo/Agencies]

Palestinians survey the scene after Israeli tank fire struck a home in Gaza City March 23, 2011. Israeli air strikes and shelling killed nine Palestinians in the Gaza Strip on Tuesday, medical officials said, in the deadliest day of conflict in the enclave in months. [Photo/Agencies]