A U.S. soldier and a Haitian civilian were killed in an exchange of gunfire at a checkpoint in the Haitian village of Gonaives this morning. Another soldier was also injured when a pickup truck rammed into the checkpoint and the passenger came out shooting. U.S. troops killed the attacker. Although the incident appears isolated, TIME Defense correspondent Mark Thompson says, it has ended a "long string of good luck" in the U.S. peacekeeping operation. "There's been a sense of, how long can this last? But it looks like the American military has responded quite forcefully."U.S. troops will transfer authority to a United Nations force by mid-March.