Jonathan Franklin - NPR
The mask-wearing requirement had been initially imposed in early 2021, shortly after President Joe Biden took office.
The group argues that the restrictions no longer reflect the "realities of the current epidemiological environment."
Missile strikes and military barrages struck Ukrainian targets from the country's northern, eastern and southern borders.
NPR answers key questions about COVID tests: What types are there? Should you self-test right after exposure to someone with COVID? And what should you do if you test positive?
The Biden administration says Americans should be able to order COVID tests online later this month.
Despite pressure from health experts who advocated for adding a testing requirement, the agency is standing by its original guidance that a negative test is not needed for people who are fever-free and whose symptoms have improved.
Colorado health officials say the case was identified in a resident who tested positive after traveling to southern Africa. Another case of the variant was reported in Minnesota earlier Thursday.