Donald Trump has approved the execution by firing squad of the man who shot and killed 13 people at Fort Hood, Texas in 2009. Former Army Maj. Key points and original sources are listed below.

• Donald Trump has approved the execution by firing squad of the man who shot and killed 13 people at Fort Hood, Texas in 2009.S1

• Former Army Maj. Nidal Hassan was sentenced to death after a court-martial that convicted him of killing 13 and wounding 32 others at an Army base in Texas.S2

• Trump approves firingsquad execution of Fort Hood shooter Nidal HasanS3

• President Donald Trump approved a firing-squad execution on Monday for Nidal Hasan, the US Army psychiatrist convicted of killing 13 people at Fort Hood in 2009. Hasan's execution will be the first carried out by the US military since 1961, with the date and l...S4

• The Trump administration has approved a plan to execute former Army Maj. Nidal Hasan — who killed 13 people in a 2009 shooting at Fort Hood — by firing squad, the Pentagon said.S5

• Pentagon spokesperson Sean Parnell said in a statement that Defense Sec. Pete Hegseth recommended the execution and it was approved by President Donald Trump.S6

• President Trump has approved the use of a firing squad to execute convicted Fort Hood shooter Nidal Hassan, the Pentagon announced Monday.S7