If another photon strikes one of these high-energy electrons, the electron releases two photons that travel together at the same wavelength.

VOA: special.2010.09.01

Another reason for the increase in bird strikes is the growing popularity of air travel in the United States.

VOA: special.2009.04.01

More than seven thousand six hundred bird and other wildlife strikes were reported for civilian aircraft in two thousand seven.

VOA: special.2009.04.01

For example, lightning can create tubes of glass when it strikes sand that has the right combination of minerals.

VOA: special.2009.09.16

This use of government troops to end strikes caused many citizens to vote against the ruling Republican Party.

VOA: special.2010.06.10

At the same time, she deplored Israeli strikes against clearly marked U.N. buildings where civilians were taking shelter.

VOA: special.2009.01.10

Usually a community will receive a warning at least a few minutes before a tornado strikes.

VOA: special.2010.05.11

If a batter gets three strikes, he loses his turn at bat and is called out.

VOA: special.2009.04.12

Recent strikes against foreign companies have included suppliers for Japanese car makers Honda and Toyota.

VOA: special.2010.06.18

But studies show only about twenty percent of bird strikes to civilian aircraft are reported.

VOA: special.2009.04.01

Today we tell about headaches, the pain that strikes almost everyone at some time.

VOA: special.2010.03.30

It can be hard to treat. Breakthrough pain is a pain that strikes suddenly.

VOA: special.2009.02.10

But these strikes caused little damage, mostly to the station's solar energy collectors.

VOA: special.2009.04.01

And,as more nations launch spacecraft, the risk of debris strikes will only grow.

VOA: special.2009.04.01