The program has cost more than $700 million so far, but has only been tested over a 37-kilometer section.

VOA: standard.2010.04.21

"The European missile defense proposal that the Russians are so concerned about has not been tested yet.

VOA: standard.2009.07.15

"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

Neither vaccine had been successful by itself when tested earlier.

VOA: special.2009.10.13