SANAA, Yemen — Two al-Qaeda operatives were killed in an apparent U.S. drone strike in the remote, mountainous Yemeni governorate of Shabwa early Thursday, according to a Yemeni security official. The information about the strike came from Col. Hamid Saleh, security director of the Mayfaa district in the Shabwa governorate. He said the men were killed when a missile struck their car. A Yemeni government spokesman, while not confirming that the missile was fired by a U.S.