The document also says "Iran continues to pose a significant challenge to Iraq's long-term stability and political independence.

VOA: standard.2009.03.31

In two other cities, Los Angeles,California and Huntsville,Alabama, a study also showed significant differences in radiation.

VOA: standard.2010.01.30

The study also found that the age of the father can play a role, although it is not as significant as the age of the mother.

VOA: standard.2010.02.10

"Coping with these kind of impacts if you're dealing with significant affects on your agriculture or your water supplies, your infrastructure and also trying to develop new kinds of energy approaches, for example--that's going to take long term investment,"

VOA: standard.2009.12.11

So I think we need to devote the resources to try to be successful," The general says the U.S.and allied effort also needs to have a significant political and economic component, and that a strong,credible government must emerge from the current election process.

VOA: standard.2009.10.16