Examining deadly Rio clashes between police and notorious gang

Drones dropping bombs is now a trend used by heavily armed criminal groups,” says Dr Carlos Solar from the Royal United Services Institute. The cartels are buying civilian drones from the open market and then adapting them to fight against competing gangs and law enforcement, he says. “They are forcing the state police and armies to integrate counter-drone attack strategies” at a time when the Brazilian government is tightened austerity measures."