SANA, Yemen — I LEARNED that my 16-year-old grandson, Abdulrahman — a United States citizen — had been killed by an American drone strike from news reports the morning after he died.

The missile killed him, his teenage cousin and at least five other civilians on Oct. 14, 2011, while the boys were eating dinner at an open-air restaurant in southern Yemen.

I visited the site later, once I was able to bear the pain of seeing where he sat in his final moments. Local residents told me his body was blown to pieces. They showed me the grave where they buried his remains. I stood over it, asking why my grandchild was dead.

Nearly two years later, I still have no answers. The United States government has refused to explain why Abdulrahman was killed. It was not until May of this year that the Obama administration, in a supposed effort to be more transparent, publicly acknowledged what the world already knew — that it was responsible for his death.

The attorney general, Eric H. Holder Jr., said only that Abdulrahman was not “specifically targeted,” raising more questions than he answered.

My grandson was killed by his own government. The Obama administration must answer for its actions and be held accountable. On Friday, I will petition a federal court in Washington to require the government to do just that.

Subscribe to The Times to read as many articles as you like.