Hasan killed 13 people and wounded 32 at Fort Hood in 2009, and his execution would be the first US military execution since 1961.
- Army rules say an execution must come 60 to 150 days after the president approves it.
- Hasan is one of 4 inmates on US military death row.
- Pentagon spokesman Sean Parnell: "Judgement day for Hasan has finally come."