Greg Bower(ph), of the International Association of Bomb Technicians and Investigators, says nitroglycerin is usually too unstable to handle safely.

NPR: It's Hard to Spot a Liquid Threat to Airline Safety

In case you've still not pieced it together, there are simply too many variables to safely say that one provider is right for every fan of HD.

ENGADGET: blogger-avatar

The moans about their inability to make profits safely sounds all too close to the noises from old-style airlines before the arrival of low-cost carriers.

ECONOMIST: Bank regulations