The Biden administration is taking the first steps toward requiring nearly all foreign visitors to the U.S. to be vaccinated for the coronavirus.

America's standing as the model for aviation-safety regulation will be on trial as congressional hearings begin into the Federal Aviation Administration's oversight of Boeing before and after two deadly crashes of its best-selling airliner. The Senate aviation subcommittee is scheduled to hear testimony Wednesday from the acting head of the FAA, the Transportation Department inspector general, who is leading a review of the FAA and Boeing, and the nation's top transportation safety investigator.

Dr. Anthony Fauci, the top U.S. infectious disease expert, said Monday the nation should consider a vaccination mandate for domestic air travel.