The acting secretary of the US Army said Tuesday that the man convicted of killing 13 people in the 2009 shooting rampage at Fort Hood, Texas, will be executed by firing squad on Dec. 3. In a post on social media, acting Secretary Adam Telle said the execution of Army Maj. Nidal Malik Hasan will take place at Fort Hood. Pentagon spokesperson Sean Parnell said Monday that President Trump had approved the execution of Hasan. The US military has not carried out the death penalty since 1961. Parnell said the plan to use a firing squad was suggested by Defense Secretary Pete Hegseth and approved by the president.