The flight tested the heat shield. The shield protected the spacecraft from the great heat produced when it returned through the Earth's atmosphere.

VOA: special.2009.06.10

They increased economic actions against North Korea after it launched missiles and tested a nuclear device.

VOA: special.2009.08.08

It tested instruments for controlling a vehicle in the weightlessness of space.

VOA: special.2010.07.07

It also tested the effect of weightlessness on living creatures.

VOA: special.2009.06.17

It tested spacesuits worn later by America's astronauts.

VOA: special.2010.07.07

It sank four times while being tested.

VOA: special.2009.09.10

By the time Bildt and Czech Foreign Minister Jan Kohout finished meeting with the Burmese, North Korea announced it had tested a second nuclear bomb.

VOA: standard.2009.05.25

She says when state regulators tested imported shrimp they found it was contaminated with antibiotics and other chemical residues that are illegal in the U.S.

VOA: standard.2010.05.27

Pyongyang pulled out of the talks earlier this year. It also tested both a long-range missile and a nuclear explosive, in violation of United Nations sanctions.

VOA: standard.2009.10.10

North Korea pulled out of the talks earlier this year. It also tested both a long-range missile and nuclear explosive earlier in the year, in violation of United Nations sanctions.

VOA: standard.2009.10.05

"There are a number of drugs that have been tested in these individuals and Avandia is one of them, and actually,it is quite effective in improving the blood sugar, in normalizing the blood sugar or delaying the occurrence of diabetes in these individuals."

VOA: standard.2010.03.02