Smoke rises in the air as flame spread across buildings after Israeli strikes in Shijaiyah neighbourhood in Gaza City, Sunday, July 20, 2014. Escalating their ground offensive, Israeli troops backed by tanks and warplanes battled Hamas militants in the crowded neighborhood early Sunday. The fighting, including heavy Israeli tank fire, killed scores of Palestinians, forced thousands to flee and damaged or destroyed dozens of homes. (AP Photo/Khalil Hamra)