of eight operatives, sent here to support hezbollah and if activated to carry out a terrorist attack. so we had assembled our de facto joint task force. everyone had expertise working together to further develop this terrorism investigation. and the case was called operation smoke screen. >> it's a manpower intensive effort to conduct a physical surveillance of a terrorism target. a number of people doing different things in order to stay on a target and not get exposed. >> one of the things we did was to rent the house across the street from mohammed hammoud. we needed fbi agents portraying themselves as a young married couple to monitor that residence 24 hours a day to find out who is coming in there, at what time, what's happening there? >> mohammed hammoud was sort of