As one of his final acts in office, US President Donald Trump granted full pardons to four former Blackwater paramilitary contractors convicted of killing 14 Iraqi civilians in a 2007 massacre in Iraq's capital.
Nicholas Slatten, who is believed to have fired the first shots, was sentenced to life in prison in 2014 for his role in the contractors' indiscriminate shooting in Baghdad's Nisoor Square. Paul Slough, Evan Liberty and Dustin Heard were found guilty of manslaughter and weapons charges for their roles in the incident.