The umbra (Latin: “shadow”) is the darkest part of a shadow. From within the umbra, the source of light is completely blocked by the object causing the shadow. This contrasts with the penumbra, where the light source is only partially blocked and there is only a partial shadow.
-—the more you know!
Weapons Pile Up in Iraq As Seizures Climb
2007-07-31 04:27am
U.S. and Iraqi forces have managed to seize a rising number of insurgent weapons after efforts to find them have increased since January, the top American general said.
Gen. David Petraeus said the new strategy of moving U.S. forces out of bases and into neighborhoods where they can act on tips from locals has helped uncover record numbers of weapons.
“We feel as if we have momentum, tactical momentum,” Petraeus said in a telephone interview from Baghdad.
The numbers of arms caches uncovered so far this year is 3,698, up from 2,726 last year, according to the military command in Iraq. “It’s staggering,” Petraeus said.
He added that dangers still remain because insurgent groups still maintain the ability to carry out large attacks. “I don’t want to paint a rosy picture,” Petraeus said.
Weapons caches include everything from rockets and surface-to-air missiles, to assault weapons, machine guns and roadside bomb components.