London Bombers Were Low Tech

Apparently, the NYPD gave a press conference today with one goal - to impress New Yorkers that what happened there can happen anywhere.

Police Commissioner Raymond Kelly warned the materials and methods used in the London attack were easily adaptable to New York.
"Initially it was thought that perhaps the materials were high-end military explosives that were smuggled, but it turns out not to be the case," Kelly said. "It's more like these terrorists went to a hardware store or some beauty supply store."
The NYPD officials said investigators believe the bombers used a peroxide-based explosive called HMDT, or hexamethylene triperoxide diamine. HMDT can be made using ordinary ingredients like hydrogen peroxide (hair bleach), citric acid (a common food preservative) and heat tablets (sometimes used by the military for cooking).
HMDT degrades at room temperature, so the bombers preserved it in a way that offered an early warning sign, said Michael Sheehan, deputy commissioner of counterterrorism at the nation's largest police department.
"In the flophouse where this was built in Leeds, they had commercial grade refrigerators to keep the materials cool," Sheehan said, describing the setup as "an indicator of a problem."

Another reminder that the cost of freedom is eternal vigilance.