A music teacher whose organist daughter was killed in a Russian missile attack last week returns to the classroom, as her Ukrainian hometown prepares for a mournful Easter.

Md., tells NPR's Ayesha Rascoe about developments following his trip to El Salvador to meet with Kilmar Abrego Garcia.

NPR's Ayesha Rascoe asks Dr. Rebecca Smith-Bindman about her research indicating CT scans, which emit radiation, will cause some 100,000 cases of cancer annually.

The Trump administration is pushing the boundaries of executive power, often by claiming emergencies.

Matthew Bunn, a professor specializing in nuclear arms control at Harvard's Kennedy School, tells NPR's Ayesha Rascoe about concerns over a new nuclear arms race as the U.S. looks increasingly inward.

Saturday saw more demonstrations in scores of cities as people expressed their opposition to the Trump administration.