For more than 60 years, nearly every large rocket used some combination of the same liquid and solid propellants. Refined ...

In some laboratories, a clear, oily liquid is treated less like a reagent and more like contraband, locked away behind blast doors and handled with rituals that look closer to bomb disposal than bench ...

U.S. officials are worried that Al Qaeda has a new liquid explosive technique that can't be detected by current security measures, according to the latest trickle of U.S. official-sourced stories in ...