U.S. cluster munitions have arrived in Ukraine, after lawmakers in both parties attempted to block President Joe Biden from sending them. Retired four-star Army General Barry McCaffrey joins Andrea Mitchell to discuss. “I think President Biden, Lloyd Austin, and Blinken were entirely correct to send them these munitions—not just as a stopgap for unitary warheads, but because they are a very effective tool, and Ukraine is fighting for its survival,” says McCaffrey.