The execution of a former US army psychiatrist by firing squad is to be livestreamed after Pete Hegseth said it would be a public event. Nidal Hasan was sentenced to death after killing 13 people at a military base in Texas in 2009. There has been widespread condemnation of the decision, including from the UN which said it would ‘amount to torture’. Lucy Hough speaks to US academic and capital punishment specialist Austin Sarat, the author of Life After Death: Surviving Execution