Early Monday morning, Secretary of State John Kerry flew to Cairo to join diplomatic efforts to bring stability to the Middle East. His trip follows a weekend that saw a sharp increase in casualties, with Sunday marking the deadliest day for both Israelis and Palestinians. Kerry is expected to push for a return to the truce agreed to in November 2012, as well as encouraging Hamas to agree to the Egypt-proposed ceasefire. Since fighting broke out two weeks ago, more than 500 Palestinians and 20 Israelis have been killed. Two of the Israeli soldiers killed were from the U.S.: Max Steinberg, 24, of California and Sean Carmeli, 21, of Texas. Hamas and Israel agreed to a brief five-hour “humanitarian pause” last week.