At least nine people have died and 11 left injured after a UPS cargo plane crashed while taking off from an international airport in Louisville, Kentucky, on Tuesday evening.
Aviation experts who spoke to BBC Verify believe the plane crashed after one engine failed and another appeared to be damaged during take-off.
It is unclear what caused the plane to crash, prompting a massive fireball to erupt after it failed to take-off from the runway. Footage showed fire had already engulfed one wing of the aircraft while it was attempting to take off, which may have spread through the plane and caused the explosion, or the jet could have caught fire after colliding with an object on the ground.
What is apparent is that the 38,000 gallons (144,000 litres) of fuel on board the MD-11 jet needed for the flight likely escalated the blaze, which quickly spread to several buildings beyond the runway and burned for hours.
BBC Verify has been analysing footage that emerged overnight to piece together how the crash unfolded.
