At indoor centers, climbers have many different paths they can use to get to the top of the walls.

VOA: special.2009.12.09

Later a transport system was added to permit people to visit an observation area inside the top of the arch.

VOA: special.2009.03.04

One such material is asphalt, a substance often placed on top of buildings and used to cover road surfaces.

VOA: special.2010.03.02

Astronauts Frank Borman,James Lovell and William Anders were in the spacecraft at the top of the Saturn Five rocket.

VOA: special.2009.07.08

When the top of the main shoot is removed by pruning or breakage the auxin is no long produced.

VOA: special.2009.10.06

He had to make sure the great light on the top of light house would shine during the black storm.

VOA: special.2010.05.08

On the fourth day of battle, Marines fought to the top of Mount Suribachi, the tallest mountain on Iwo Jima.

VOA: special.2011.05.30

At the time, scientists believed that a person at the top of the mountain would only have enough oxygen to sleep.

VOA: special.2010.06.30

The same ten cities stay at the top of the list from year to year, although their order may change slightly.

VOA: special.2009.03.27

Since nineteen fifty-three, more than ten thousand people have attempted to climb to the top of the world's highest mountain.

VOA: special.2010.06.30

The BP company pumped heavy drilling fluids,known as mud, into the top of its damaged well in the Gulf of Mexico.

VOA: special.2010.08.07

A Beatles song was almost always at the top of the charts until the group's next hit replaced it.

VOA: special.2010.07.30

It held for a while. Then Union soldiers acting without orders forced their way to the top of the hill.

VOA: special.2009.11.26

Of course,I could yell my opinion at the top of my lungs, or as loudly as I possibly could.

VOA: special.2010.01.24