This time,scientists hope to learn more about the formation, wind speed and shape of tornadoes.

VOA: special.2009.06.09

The rise of these births may be linked to increased use of drugs to start or speed up labor and more births by Cesarean section.

VOA: special.2009.10.26

It was flying more than five times the speed of sound.

VOA: special.2010.07.07

The crew often added many more to increase the speed.

VOA: special.2009.12.23

That was more than seven times the speed of sound.

VOA: special.2010.07.07

But some Democratic lawmakers contend the long-term key to defeating the insurgency in Afghanistan is not to send more foreign troops, but to speed training of Afghan security forces.

VOA: standard.2009.10.25

"The key thing is an economically viable coalition more than one that is reached with great speed - something that is going to reassure the markets that the economic problems are really top of the agenda."

VOA: standard.2010.05.10