Burn Notice2007

Michael Westen:
[narrative] If you're looking to frame a specific group for a bombing, you use their design plans, their construction materials, and their particular brand of C-4. Bomb experts know that not all C-4 is the same. The same taggant chemicals that allow manufacturers to identify their own product will also allow forensic teams to track down the source country to determine who's to blame. It's just like checking the label on a t-shirt to determine where it's made, only a little more complicated.