The doomed EgyptAir Flight 804 did not swerve or lose altitude before it disappeared off radar, the head of Egypt's state-run provider of air navigation services has said. The comments by Ehab Azmy, head of the National Air Navigation Services Company, challenged an earlier account by Greece's defence minister. Share Go To A French ship on Monday joined the international effort to hunt for the black boxes and other wreckage of the flight, which crashed...