President Biden on Friday warned that the U.S. stands prepared to “act forcefully” to protect its citizens from attacks after a suspected Iranian-made drone was used in an attack that killed an American contractor and wounded at least five troops in Syria. In remarks during a joint press conference with Canadian Prime Minister Justin Trudeau in Ottawa, Mr. Biden offered his condolences to the families of those lost in the attack and commended the U.S. military for its response.“Make no mistake, the U.S. does not … seek conflict with Iran but be prepared to act forcefully to protect our people,”...