Egyptian army and policemen carry coffins covered with the national flags at Almaza military Airbase in Cairo on August 19, 2013, during a funeral for 25 policemen who were killed near the border town of Rafah, North Sinai. Militants killed 25 policemen in the deadliest attack of its kind in years, as Egypt's army-installed rulers escalated a campaign to crush ousted president Mohamed Morsi's Muslim Brotherhood.