Several Republican senators are pressing the Pentagon to disclose who ordered a follow-up strike on survivors from an earlier missile attack on a suspected Venezuelan drug boat. The lawmakers say that targeting defenseless individuals at sea raises grave concerns about possible violations of international law and military conduct.

In March 2014, Russia seized Ukraine’s Crimean Peninsula in a swift, bloodless operation the world overwhelmingly deemed illegal. That single move plunged Moscow’s relations with the West into their steepest decline since the Cold War—a rift that still defines European security.