mistakes all along the way. >> reporter: once identified, the idea was to watch him, listen, try to record phone calls, allow shahzad to make more mistakes and perhaps lead to accomplices. by monday, sources said he got spooked apparently deciding to flee, as agents decided to track his movements, one of the first things they did, sources tell cnn, was put his name on a no-fly list. monday night as he drove to jfk's international, according to federal sources he called emirate's air reserving his seat for this flight bound for dubai which would eventually connect to islamabad, pakistan. unknown to shahzad, there was no way he was going anywhere. even though the fbi briefly lost track of him, customs and border protection agents began examining flight manifests. shortly after he arrives, an emirates employee tells law enforcement a man had just paid cash for one-way ticket to pakistan. according to account by cnn by