A 'strong' possibility that a terror attack brought down EgyptAir 804 early Thursday over the Mediterranean will prompt U.S. officials to take a hard look at international security measures in airports in Paris and Cairo, which both send flights directly to the United States, experts said.The EgyptAir flight left from Paris' Charles de Gaulle airport, which sends dozens of flights daily to the U.S. and meets the toughest safety standards. In recent months, following terror attacks last November in Paris, French authorities revoked security passes for dozens of workers with suspected ties to radical Islamists.
