Early one morning in September 2011, Abdulrahman set out from our home in Sana by himself. He went to look for his father, whom he hadn’t seen for years. He left a note for his mother explaining that he missed his father and wanted to find him, and asking her to forgive him for leaving without permission.

A couple of days after Abdulrahman left, we were relieved to receive word that he was safe and with cousins in southern Yemen, where our family is from. Days later, his father was targeted and killed by American drones in a northern province, hundreds of miles away. After Anwar died, Abdulrahman called us and said he was going to return home.

That was the last time I heard his voice. He was killed just two weeks after his father.

A country that believes it does not even need to answer for killing its own is not the America I once knew. From 1966 to 1977, I fulfilled a childhood dream and studied in the United States as a Fulbright scholar, earning my doctorate and then working as a researcher and assistant professor at universities in New Mexico, Nebraska and Minnesota.

I have fond memories of those years. When I first came to the United States as a student, my host family took me camping by the ocean and on road trips to places like Yosemite, Disneyland and New York — and it was wonderful.

After returning to Yemen, I used my American education and skills to help my country, serving as Yemen’s minister of agriculture and fisheries and establishing one of the country’s leading institutions of higher learning, Ibb University. Abdulrahman used to tell me he wanted to follow in my footsteps and go back to America to study. I can’t bear to think of those conversations now.

After Anwar was put on the government’s list, but before he was killed, the American Civil Liberties Union and the Center for Constitutional Rights represented me in a lawsuit challenging the government’s claim that it could kill anyone it deemed an enemy of the state.

The court dismissed the case, saying that I did not have standing to sue on my son’s behalf and that the government’s targeted killing program was outside the court’s jurisdiction anyway.