Supporters of the Yemeni government are seen through the smoke of a burning vehicle belonging to them destroyed and set on fire by anti-government demonstrators during clashes in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
Yemeni anti-government demonstrators display their local currency during a demonstration demanding the resignation of President Ali Abdullah Saleh, in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
Yemeni anti-government demonstrators destroy a vehicle belonging to supporters of President Ali Abdullah Saleh during clashes in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
A Yemeni anti-government demonstrator stands on top of a destroyed vehicle belongs to supporters of President Ali Abdullah Saleh during clashes in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
Yemeni anti-government demonstrators shout at supporters of President Ali Abdullah Saleh, not pictured, as they gather a top and around a destroyed vehicle belonging to the supporters, during clashes in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
A Yemeni anti-government demonstrator rides his bike past a burning vehicle belonging to supporters of President Ali Abdullah Saleh during clashes in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
Yemeni anti-government demonstrators react during a demonstration demanding the resignation of President Ali Abdullah Saleh, in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
A Yemeni police officer pushes back a government supporters chanting slogans facing anti-government demonstrators, not pictured, in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
Supporters of President Ali Abdullah Saleh raise his posters facing anti-government demonstrators, in Sanaa, Yemen, Tuesday, Feb. 22, 2011. Yemen's embattled leader rejects demands that he step down, calling demonstrations against his regime unacceptable acts of provocation and offers to begin a dialogue with protesters. (AP Photo/Muhammed Muheisen)
