NEW YORK — A former federal transportation security agent was held on $3,000 bail Saturday after being charged with luring a 21-year-old Korean exchange student going to school in Utah into a bathroom at a New York City airport and molesting her. Maxie Oquendo, 40, was arrested Thursday on unlawful imprisonment, official misconduct and sexual abuse charges, two days after authorities say the Transportation Security Administration agent confronted the woman after she stepped off a flight from Salt Lake City, telling her a “secondary security screening” was necessary. The TSA said it has fired Oquendo. Queens District Attorney Richard A.