Delhi Metro passengers watch a police personnel patrolling with a sniffer dog on a train platform at a metro station during a mock drill conducted by the Delhi Police and Delhi metro authorities in New Delhi on February 15, 2012. Over 40,000 people in India’s capital took part in a mass earthquake drill as the tremor-prone city of 16 million seeks to improve its preparedness for a disaster. AFP PHOTO/RAVEENDRAN (Photo credit should read RAVEENDRAN/AFP/Getty Images)