War, tariffs and the Air India crash will cast a shadow over the Paris Air Show as the aerospace industry's biggest annual gathering opens on Monday.

Here is a list of the deadliest plane disasters in the 21st century, excluding the Sept. 11, 2001, attacks: On July 17, 2014, Malaysia Airlines flight MH17 was shot down over rebel-held eastern Ukraine en route to Kuala Lumpur from Amsterdam. All 298 people aboard the Boeing 777 were killed, including 193 Dutch nationals.

Air India Flight 171 crash has placed Boeings 787-8 Dreamliner under fresh scrutiny. While investigations continue, past safety concerns and whistleblower warnings now resurface regarding Boeing Dreamliner's safety.

Plane travel is statistically one of the safest modes of travel. But when things goes wrong, the results are often disastrous.

Many people were killed when an Air India plane bound for London with 242 people on board crashed minutes after taking off from the western city of Ahmedabad