This could be a serious problem. The shield protected the spacecraft from burning up from the extreme heat of re-entering the Earth's atmosphere.

VOA: special.2009.06.17

Lemelson died in 1997 at the age of 74, but the foundation that he set up promotes problem-solving through invention and innovation.

VOA: standard.2009.12.18

But,Steve Coll at the New America Foundation says the brother remains a problem, and Washington is just giving him more time to shape up.

VOA: standard.2010.05.28

"I cannot travel with my hair products, a lot of make up, a lot of different things that you would not think would be a problem,"

VOA: standard.2009.09.07

According to Ben Urbonas, president of the Urban Watersheds Research Institute, these nutrient contaminants tend to be more of a problem in closed water systems,like lakes, where concentrations can build up.

VOA: standard.2010.08.04

"But the problem on the relief well is not simply drilling all the way down, it is also connecting it up, and that is a delicate operation that could take some time."

VOA: standard.2010.07.16

"When you touch that ice bear, you're touching the Arctic, you're touching the whole of that problem and what I hope is people will touch the bear, touch the Arctic, will get an understanding for the problem up there and ultimately become part of the solution,".

VOA: standard.2009.12.13