US President Barack Obama has ordered a review of the supply of military hardware to US police departments amid concern about the deployment of heavily armed "robo-cop" officers during protests after the shooting dead of a teenager.
America was shocked by the images of protesters in Missouri being confronted by combat-ready officers in body armour, equipped with semi-automatic weapons and sniper's rifles, backed up by armoured vehicles.
The racially charged protests were triggered in the St Louis suburb of Ferguson after the fatal shooting by a white policeman of Michael Brown, an unarmed, African-American 18-year-old.
Mr Obama has now instructed his officials to review the post-9/11 strategy of distributing Pentagon weaponry and equipment such as body armour, mine-resistant trucks, silencers and automatic rifles to police forces across the country.
The president has ordered them to assess whether to continue supplying the material and, if so, whether the police departments are receiving the training to use the equipment appropriately.