It’s a disturbing coincidence. Two years ago, the A320 that crashed into the Mediterranean Thursday was painted with the words, “We will bring this plane down” by Cairo ground crew protesting Egypt’s President. Investigators nonetheless haven’t narrowed possible causes of the tragedy, ranging from terrorism to technical failure. Data from Paris-to-Cairo Flight MS804 reportedly indicate a loss of flight control and smoke alarms. Some remains of the 66 onboard have been recovered, and now an Egyptian submarine has been deployed to find the plane and its flight recorders between Crete and Egypt.