President Joe Biden will nominate Michael Whitaker to lead the Federal Aviation Administration after his first choice withdrew in March after facing opposition from Republican senators.

Three of the major U.S. transportation safety agencies are without permanent leaders as the U.S. contends with toxic railway spills, near-collisions on runways and rising traffic deaths.

WASHINGTON — President Joe Biden has picked Polly Trottenberg, a top aide in the Transportation Department, to serve as acting administrator of the Federal Aviation Administration.

Billy Nolen, acting administrator of the U.S. Federal Aviation Administration, is stepping down after just over a year on the job.

Updates to national aviation and pipeline safety policies will dominate the upcoming schedule for the transportation panel in the U.S. House of Representatives.

WILMINGTON, Del. — President Joe Biden’s choice to run the Federal Aviation Administration, Phillip Washington,  has withdrawn his nomination, a setback for the administration.

A vote on President Joe Biden’s choice to run the Federal Aviation Administration was delayed indefinitely March 22 in the face of an opposition blitz by Republicans, who say the nominee lacks enough experience in aviation to lead the agency, which is under pressure to stem a surge in dangerous close calls between planes.

WASHINGTON — The Biden administration proposed June 15 that future planes produce lower levels of greenhouse gas emissions before they can be certified by federal regulators.

Commercial U.S. drone flights are set to receive a huge boost as soon as the week starting Dec. 28 with requirements that most of the devices must transmit a radio beacon with a digital license plate.

Boeing Co. is plotting a low-key comeback for the 737 Max, the grounded jetliner that has spent almost two years engulfed in controversy and tragedy after two fatal crashes, said people familiar with the matter.