Shortly after Pollard began working at NIC/TF-168, he met Aviem Sella, a combat veteran of the Israeli Air Force. At the time, Sella was on leave from his position as a colonel to gain a master's degree in computer science as a graduate student at New York University. Pollard told Sella that he worked for U.S. naval intelligence, told him about specific incidents where U.S. intelligence was withholding information from Israel, and offered to work as a spy. Though Sella had wondered whether Pollard was part of an FBI sting operation to recruit an Israeli, he ended up believing him. Sella phoned his air-force intelligence commander in Tel Aviv for further instructions, and the call was switched to the air-force chief of staff. Sella was ordered to develop a contact with Pollard, but to be careful. He was warned that either the Americans were offering a "dangle" in order to root out foreign intelligence operations, or if this was a genuine spy, Sella would have to pay careful attention to his work.