"Indeed, over the months that followed, as the targets of the investigation spoke with a sometimes unfocused zeal about waging holy war, the informer, one of two used in the investigation, would tell them that he could get them the sophisticated weapons they wanted. He would accompany them on surveillance missions to military installations, debating the risks, and when the men looked ready to purchase the weapons, it was the informer who seemed to be pushing the idea of buying the deadliest items, startling at least one of the suspects."