The collapse of the Soviet Union and the breakup of Yugoslavia in the nineteen nineties challenged NATO's traditional position as a defensive alliance.

VOA: special.2009.04.04

But the statute is being challenged by the Kurdistan Workers Party in Turkey and the Tamil Tigers in Sri Lanka.

VOA: standard.2009.10.01

All who organized and fomented [that unrest and played the game of our enemies must be challenged and confronted,he charged.

VOA: standard.2009.08.28

But SWAPO has been challenged by the emergence of a new party, the Rally for Democracy and Progress.

VOA: standard.2009.11.28

The lead plaintiff in the Chicago case,Otis McDonald, challenged the law after he said criminals broke into his home and made repeated threats.

VOA: standard.2010.06.29

Earlier this year, the president challenged the private sector to join with government in a nationwide effort to boost student achievement in science and mathematics.

VOA: standard.2009.11.24

Opposition leaders Mir Hussein Mousavi, Mehdi Karroubi and former president Mohammed Khatami have all challenged Mr.Ahmadinejad's legitimacy, arguing that he won re-election through fraud and vote-rigging.

VOA: standard.2009.08.28

He has challenged the administration's commitment to fighting terror in numerous speeches and interviews.

VOA: standard.2010.02.14

"But a baby who has a defect in those brain stem circuits that use serotonin can't do that when challenged and they go on to die."

VOA: standard.2010.02.08

But SWAPO is being challenged by a new party,the Rally for Democracy and Progress.

VOA: standard.2009.11.27

Otherwise,we will face political challenges and our institutions will really be challenged.

VOA: standard.2009.10.20

It's a tactic, it's not an end in itself, and I think that the only thing TV Marti has challenged is that Congress truly cares about the taxpayer money,".

VOA: standard.2009.06.18

Ridgway says working on the book challenged him intellectually and emotionally.

VOA: standard.2009.10.21

"I think people really like to be challenged when they go to the cinema and you watch it and you want to go back again and take more from it."

VOA: standard.2010.07.16

They are steps that are working." Bernanke says the Federal Reserve and other economic policy makers have been challenged by unprecedented events in the past few years, but his objective has not changed.

VOA: standard.2009.08.25