On Friday, American jets killed Abu Ali al-Harithi, a midlevel Qaeda operative, and several other militant suspects in a strike in southern Yemen. According to witnesses, four civilians were also killed in the airstrike. Weeks earlier, drone aircraft fired missiles aimed at Anwar al-Awlaki, the radical American-born cleric who the United States government has tried to kill for more than a year. Mr. Awlaki survived.
The recent operations come after a nearly year-long pause in American airstrikes, which were halted amid concerns that poor intelligence had led to bungled missions and civilian deaths that were undercutting the goals of the secret campaign.