Leaders of Rio de Janeiro's heavily armed drug gangs agree on at least one thing with the head of Brazil's army: An ongoing military intervention cannot solve the soaring crime and violence that is roiling the seaside metropolis. "Will the army break this cycle of violence?" asked a leader of the Red Command, Rio's most powerful drug gang, on a recent weeknight as deputies weighed marijuana and cocaine on a digital scale in a slum from which they operate. "Not a chance." The comments come two months after President Michel Temer deployed 30,000 troops here, saying organised crime had "taken over Rio de Janeiro."