SFO holds first safety drill after Asiana crash

San Francisco International Airport closed Runways 1L and 1R on Wednesday morning to hold its first full-scale safety drill since the Asiana Flight 214 crash last summer.

For three hours, first-responders practiced on volunteers who wore makeup and acted out injuries. Regulators require airports to conduct these drills once every three years, though some airports, including SFO, do them more often.

Here's how it looked on social media.