[SunkenCiv]

No Terrorist Groups Took Credit for Downing EgyptAir Flight 804. So Experts Have Other Theories
http://time.com/4349687/egyptair-flight-804-bomb-isis-al-qaeda/

Smoke Alerts Like That on Flight 804 Have Raised Questions in the Past
http://www.wsj.com/articles/smoke-alerts-like-that-on-flight-804-have-raised-questions-in-the-past-1464390994

Rep. Ed Royce: ‘Highly Likely’ Terror Behind EgyptAir Flight 804 Crash
http://abcnews.go.com/Politics/rep-ed-royce-highly-terror-egyptair-flight-804/story?id=39288076

[sunrise_sunset]

My guess is it was a trial run. Much like Phil Airlines bombing many years ago.