US President Donald Trump has approved the execution by firing squad of former Army psychiatrist Major Nidal Hasan, who was sentenced to death for killing 13 people in a 2009 shooting at Fort Hood, Texas. Nidal Malik Hasan is set to die at the same military base where he committed a massacre in the first US military execution since 1961. Key points and original sources are listed below.

• US President Donald Trump has approved the execution by firing squad of former Army psychiatrist Major Nidal Hasan, who was sentenced to death for killing 13 people in a 2009 shooting at Fort Hood, Texas. Pentagon spokesman Sean Parnell said the execution was...S1

• Nidal Malik Hasan is set to die at the same military base where he committed a massacre in the first US military execution since 1961.S2