investigators discover the homemade bombs contained tatp. september 2009, arrested for plotting to bomb a new york city subway. zazi gets the ingredients at a colorado beauty supply store, a lowe s and walmart. you are going to get these people trying to monitor what they purchase. reporter: seth jones specializes at counterterrorism. since ingredients are so readily available, buying the items may not raise suspicions. that s why intel is key. zazi who was identified in 2009 was involved in boiling tatp in his hotel room in aurora was not identified for the ingredien ingredients he was purchasing.