Airport : All four runways at San Francisco 's airport are now operational , airport says . A girl , who 'd been in critical condition , died this morning at a San Francisco hospital . A teen who died earlier was hit by fire truck , police say . Investigators turned the runway back over to the airport . Her body was believed to be covered in foam sprayed by firefighters , airport says .
Airport : All four runways at San Francisco 's airport are now operational , airport says . A girl , who 'd been in critical condition , died this morning at a San Francisco hospital . A teen who died earlier was hit by fire truck , police say . Her body was believed to be covered in foam sprayed by firefighters , airport says .