A Colombian anti-narcotics police officer stands with Mona, his drug-sniffing dog, after decoration by Colombia's police chief General Rodolfo Palomino at the police building in Bogota, Colombia September 7, 2015. Police in Colombia and Mexico have seized more than two tonnes of cocaine after a drug-sniffing dog alerted authorities in Bogota to the narcotics, which had been dyed black and falsely registered as an ingredient in printer cartridges, the Colombian police said on Monday. REUTERS/ John Vizcaino