A new report on the December 12 U.S. drone strike that killed 12 guests at a Yemeni wedding calls on President Obama to come clean on the standards it uses to decide who lives and who dies and when drones are an appropriate weapon in the so-called “War on Terror.”

Human Rights Watch published a 28-page report ("A Wedding That Became a Funeral") in February highlighting various versions of the events that tore families apart about two weeks before Christmas 2013. One of the most relevant revelations in the study is that, as reported by The Intercept, “some, if not all, of the victims may have been civilians.”

An Associated Press story on the Human Rights Watch study reported a few additional details:

"We asked both the Yemeni and the U.S. authorities to tell us which of the dead and wounded were members of militant groups and which if any were civilians," report author Letta Tayler, a senior terrorism and counterterrorism researcher at Human Rights Watch, told The Associated Press. "They did not reply to this question.”