This image made from video released to reporters in Pakistan in 2013 shows Warren Weinstein, the U.S. aid worker who was kidnapped in Pakistan by al-Qaida in 2011. The White House says Weinstein and another hostage were inadvertently killed during U.S. counterterrorism operations in a border region of Afghanistan and Pakistan in January. AP hide caption

itoggle caption AP

President Obama expresses his condolences today to the families of the American and Italian aid workers killed in a U.S. counterterrorism operation in January. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

Warren Weinstein, who was kidnapped in Pakistan in August 2011, in a video sent to news outlets by al-Qaida's media wing. The Associated Press hide caption

itoggle caption The Associated Press