Armed members of the airport police patrol with a sniffing dog outside the international airport in Manila May 3, 2011. Philippine President Benigno Aquino on Monday tightened security in airports and places hosting embassies for possible retaliatory terror attacks in the wake of the death of al Qaeda leader Osama bin Laden in a U.S.-led operation in Pakistan on Sunday, local media reported. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: MILITARY CRIME LAW)