article_snippet.sent: (CNN)Warren Weinstein, who appears to have been the only American citizen held hostage by al Qaeda, was accidentally killed in a U.S. drone strike in January.
article_snippet.sent: On Thursday, U.S. announced that U.S. hostage Warren Weinstein had been killed in a "counterterrorism operation" in January, which is how U.S. often describes CIA drone strikes.
article_snippet.sent: It is in one of these strikes that U.S. hostage Warren Weinstein was almost certainly killed.
highlights_snippet.sent: U.S. hostage Warren Weinstein is believed to have been accidentally killed in counter-terrorism strike .
  