As Libya reaches 'tipping point,' Gadhafi's whereabouts unknown

Monday, August 22, 2011 | 8:00 a.m. CDT; updated 10:39 a.m. CDT, Monday, August 22, 2011

VINEYARD HAVEN, Mass. — President Barack Obama said Moammar Gadhafi must recognize his time is over in Libya, and a leading State Department diplomat said it's "only a matter of time" before the besieged ruler is history.

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