As a witness to the removal of fallen U.S. troops from Afghanistan, Army Chaplain Christopher John Antal cant recall a time when that solemn ceremony wasnt conducted without the presence of drones passing along the horizon. On April 12, Antal resigned his commission as an officer in the Army because of his conscientious objection to the United States drone policy. In a letter addressed to ... Barack Obama, Antal wrote, The executive branch continues to claim the right to kill anyone, anywhere on Earth, at any time, for secret reasons, based on secret evidence, in a secret process, undertaken by unidentified officials. I refuse to support this policy of unaccountable killing. In doing so, he joined other previous members of the armed forces who have addressed Obama to criticize his drone strike policy, including four former members of the Air Force who penned a letter in November of 2015 warning the president that the strikes served as a recruitment tool similar to Guantanamo Bay. Antals resignation concluded nearly eight years of service as an Army chaplain. He publicly voiced [his concerns about the targeted killings] in a Veterans Day sermon Nov. 11, 2012, when he gave a lyrical sermon criticizing drones on his base in Afghanistan and posted it online. Antal ... was called into the office of a general who told him to take down the sermon. He told me that my message did not support the mission, Antal said. He worried that his views about drones could land him in a military prison if did not leave his post.