The Wall Street Journal reports: A U.S. drone strike in January targeting a suspected al Qaeda compound in Pakistan inadvertently killed an American and Italian being held hostage by the group, senior Obama administration officials said.

The killing of American development expert Warren Weinstein and Italian aid worker Giovanni Lo Porto is the first known instance in which the U.S. has accidentally killed a hostage in a drone strike.

The mishap represents a major blow to the Central Intelligence Agency and its covert drone program in Pakistan, which President Barack Obama embraced and expanded after coming to office in 2009.

The incident also underscores the limits of U.S. intelligence and the risk of unintended consequences in executing a targeted killing program which, according to human rights groups, endangers civilians. U.S. officials say the strikes are needed to combat al Qaeda. To mitigate the risks, officials say the CIA won’t launch missiles at a suspected target if they know civilians are present. [Continue reading…]