President Biden says the United States will respond to an attack in the Middle East that killed three American troops. The president said the U-S military had a “tough day” when three Americans were killed and dozens more military members were injured near the Syrian border. Speaking at a Baptist church in South Carolina, Mr. Biden said the U-S “shall respond” after he observed a moment of silence. He blamed Iran-backed militias for the first U-S fatalities after months of strikes by such groups against American forces across the Middle East amid the Israel-Hamas war.