Obama says Gadhafi's time is up as Libya's leader

President Barack Obama dropped the careful condemnation, threats of consequences and the reminders to Moammar Gadhafi's regime about its responsibility to avoid violence.

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Obama: It's time for Gadhafi to go

For the first time, the president drops his careful condemnation of the Libyan leader.

He 'needs to do what is right' 

Also: 

• U.N. imposes sanctions
• Tunisian PM resigns
• Rebels prepare for fight