It was a little over a week ago that Iranian drones first began appearing in the skies over Ukraine. Andriana Arekhta, a junior sergeant with the Ukrainian Armed Forces, said the drones flew from Crimea to attack her special forces unit fighting near the southern city of Kherson. The drones evaded the soldiers’ defenses and dropped bombs on their position, destroying two tanks with their crews inside. “It’s very difficult to see these drones on radars,” said Arekhta, who traveled to Washington, D.C., last week as part of a delegation of female Ukrainian soldiers. “It’s a huge problem.” Over the...