Palestinian medics treat children injured by an Israel strike at the Shifa hospital in Gaza City, Wednesday, July 9, 2014. Israeli officials warned Wednesday that an invasion of Gaza could prove necessary if Hamas does not stop firing rockets, as the army intensified its offensive by striking nearly 200 Hamas targets and killing more than a dozen people on the second day of its military operation. Hamas official Musheer al-Masri said Israel had crossed all the red lines and warned that Hamas would strike back fiercely. (AP Photo/Khalil Hamra)