This gives them their color. However,when light travels from air to snow, some light is sent back,or reflected.

VOA: special.2010.01.05

Such problems had led Air France to begin replacing older sensors on some of its Airbus planes, but not the one that crashed.

VOA: special.2009.06.13

Some Americans become doctors by joining the United States Army,Navy, Air Force or Public Health Service.

VOA: special.2009.06.02

Some Americans become doctors by joining the United States Army, Navy,Air Force or Public Health Service.

VOA: special.2010.07.13

Some travel guides have described Luxor as the world's largest "open-air museum."

VOA: special.2011.03.08

Some are "air plants" that grow on trees.

VOA: special.2010.04.06

The UN Humanitarian Air Service flies humanitarian workers to some of the hardest-to-reach emergency operations in the world.

VOA: standard.2009.08.02

All air travelers arriving asked in the United States now face some measure of increased scrutiny.

VOA: standard.2010.01.05

The U.S.military has assumed control of air traffic control in and out of the capital, prompting complaints from some aid organizations and foreign officials.

VOA: standard.2010.01.18

It involves moving thousands of U.S.forces stationed on Okinawa, building a new air base and re-locating some of the troops to Guam, among other aspects.

VOA: standard.2009.10.18

But some operators are less pleased. Loren Rutherford of Nomad Adventure Tours says higher air fares to South Africa have hurt her moderately-priced camping safaris.

VOA: standard.2010.06.03

Bigger livestock herds are putting greater pressure on land resources and disrupting some ecosystems and the animals generate significant amounts of water and air pollution, including methane, a climate-changing greenhouse gas.

VOA: standard.2010.02.22

"I was appalled. When you read through it it's sort of like it's a memo out of some science fiction movie - I mean, the temperature of the air can't be any lower than thus and so, you can't do it for any few minutes.

VOA: standard.2009.04.17

That force is scheduled to be reduced from nearly by next October,and to zero by the end of 2011, although Secretary Gates said Friday there could be a follow-on agreement for some U.S.troops to stay, particularly elements of the Air Force.

VOA: standard.2009.12.12

strategic objective." The defense secretary has given several hints of his views on the way forward in Afghanistan, including a speech earlier Monday in which he cautioned against an over-reliance on air power and high technology, which some officials believe should be used more in Afghanistan, instead of the additional troops the U.S.and NATO commander there wants.

VOA: standard.2009.10.06

"There were some problems with some tactics, techniques and procedures, the way in which close air support was supposed to have been executed in this case, such that, at least with one of the aircraft involved, a B-1 bomber, that plane because of how it takes its bombing routes had to break away from positive I.D.

VOA: standard.2009.06.08