Early on Friday morning, a middle-aged man got off an Air India flight from Dubai at the national capital's international airport. He was booked on a connecting flight to Kathmandu but the man did not appear to be in any particular hurry. Nearly an hour later, he approached the airport's help-desk. "Hello, I am an ISI agent. But I don't wish to continue any further and want to remain in India," the 38-year-old told the staffer manning the counter shortly after 6 am. The ISI, or Inter Services Intelligence is the largest of Pakistan's five intelligence agency that New Delhi accuses of supporting terrorist acts in India.