Which airlines are still flying Boeing 737 MAX 8s?

The first Boeing 737 MAX 7 aircraft sits on the tarmac outside of the Boeing factory in Renton, Wash., on Feb. 5, 2018. Stephen Brashear/Getty Images

An investigation is underway after a Boeing 737 MAX 8 aircraft crashed Sunday in Ethiopia, killing all 157 people on board.

It is the second time in less than six months that one of the planes has crashed within minutes of takeoff, after a new Lion Air Boeing 737 MAX 8 flight went down over the Java Sea last October, killing 189 people.