"I've always loved working with the robots. And when I first started it was a challenge working with the robots, understanding how they worked and figuring them out.

VOA: special.2010.07.28

Speaking after a meeting with the Democrat chairmen of the congressional budget committees, the president issued a challenge to his critics.

VOA: standard.2009.03.17

Another problem is access. Connecting informal communities to the city's water pipeline is a challenge because many are living on the land illegally.

VOA: standard.2010.08.04

Most vaccines help prevent disease in children,but reaching children in remote rural areas is often a challenge especially in poorer and war-torn countries.

VOA: standard.2009.12.28

But it is a challenge that needs to be addressed immediately before it is too late,".

VOA: standard.2009.04.24

"It is a challenge after just a few months of implementation to be able to speak with confidence about when these things will occur,"

VOA: standard.2009.09.04

"Like the young people, this is a challenge to do in his life,".

VOA: standard.2009.11.08

"I know starting your careers in troubled times is a challenge,"

VOA: standard.2009.05.14

Next month,the former Alaska governor heads to Arizona to campaign for her former running mate, Senator John McCain, who faces a challenge in the Republican primary from former Representative J.D.Hayworth.

VOA: standard.2010.02.09

One of the most closely watched cases this term will be heard early next year when the high court considers a challenge to gun control laws in the city of Chicago.

VOA: standard.2009.10.05

For Garson,it has been a challenge to put aside his concerns about Haiti, and focus on football and the most important game of his career, but he has a simple message to Haitians.

VOA: standard.2010.02.04

While this past year has been a challenge for the opposition Green Movement, senior scholar Gary Sick of Columbia University says that in the aftermath of the election, the Iranian government also faces a huge challenge.

VOA: standard.2010.06.11

"This nuclear testing poses a grave threat, a challenge to the NEPT regime and also poses a grave threat to the peace and security,stability, not only in the Northeast Asian region, but also the whole global community,".

VOA: standard.2009.05.25

So the first challenge is, how do we reach all the women who do not have access to a prevention program?"

VOA: special.2009.07.29