Sen. Dianne Feinstein called on the Federal Aviation Administration to ground all Boeing 737 MAX 8 airplanes until an investigation into the Ethiopian Airlines plane crash that killed 157 people on Sunday is complete. “Until the cause of the crash is known and it’s clear that similar risks aren’t present in the domestic fleet, I believe all Boeing 737 MAX 8 series aircraft operating in the United States should be temporarily grounded,” Feinstein said in a statement.