1• The plane was a Boeing Co. 777, one of the most reliable jets in the air.
2• Why did it turn around before disappearing? That means the plane deviated from its planned route.
3• With today's technology, how is it possible for the plane to vanish without a distress call? When they do disappear suddenly, it's typically because of an event such as a massive engine failure or explosion. Yet, that would create widely scattered, and visible, debris.
4• The Gulf of Thailand, where most of the search was conducted, is only 269 feet deep, and therefore a wreckage plume would be visible
5• There were reports that a window or door fragment from a plane had been spotted, yet it wasn't recovered.
6• The early warning system for the North American Air Defense Command detected no anomalies related to Flight MH370. The command's infrared and visual imagery can pick up heat sources such as explosions and missile launches.
7• US intelligence agencies also didn't turn up a burst of chatter online or on the airwaves of the type that often follows an attack.
8• Before takeoff from Kuala Lumpur, Malaysian Airliness removed the baggage of five passengers who didn't board after checking in. "There are issues about the passengers that did not fly on the aircraft," said Azharuddin Abdul Rahman, director general of Malaysia's Department of Civil Aviation.
9• Where is the Black Box? Honeywell International Inc manufactures the 777's recorders and the so-called emergency locator transmitter (ELT), a separate beacon that sends a homing signal in the event of a sharp impact such as a crash. The black-box unit emits a ping when underwater, where the ELT won't work.
* with reporting by Bloomberg
