2018 has already had 3 deadly commercial passenger plane crashes

US-Bangla Flight 211 crashed in Kathmandu, Nepal on Monday, killing at least 40 of the 71 people on board. It's the third commercial airplane crash on record in 2018, after zero people died in such crashes in 2017.

Why it matters: Last year was the safest year on record for commercial air travel. But at least 177 people have already died in plane crashes this year, and it's only March.