What Brought Down EgyptAir Flight 804? par ABC News

Investigators race to determine if it was terrorism, mechanical failure or something else. - - SUBSCRIBE to ABC NEWS: https://www.youtube.com/ABCNews/ - Watch More on http://abcnews.go.com/ - LIKE ABC News on FACEBOOK - https://www.facebook.com/abcnews - FOLLOW ABC News on TWITTER: - https://twitter.com/abc - GOOD MORNING AMERICA'S HOMEPAGE: - https://gma.yahoo.com/