Crews who work on planes that fly into the U.S. could face alcohol, drug tests.
The Republican said the missing plane could have landed somewhere as part of terror scheme.
Dianne Feinstein is citing personal experience in a call for regulation of unmanned aircraft.
The leading airport for flight trouble is Washington’s Reagan National.
King said the pilot and the co-pilot “should have been the focus from the start.”
"I think this all leads toward the cockpit,” the Texas Republican said.
Twenty-five countries are now involved in the search as speculation turns to pilots.
Malaysia’s prime minister said missing airplane was deliberately diverted.
"In many ways we're back where we started," said Rep. Peter King.
A bid to gain access to airports in the U.S. and European Union by Norwegian Airlines has riled the American aviation industry.
Norwegian Air is attempting to gain access to airports that are covered under the U.S. and European Union’s “Open Skies” agreement by registering its airplanes in Ireland, which is a member of the EU.