A Yemeni boy waits next to his family's belongings as they evacuate Sanaa due to clashes between tribesmen and security forces in Sanaa, Yemen, Thursday, May 26, 2011. Yemen's government said 28 ... more 
A Yemeni boy waits next to his family's belongings as they evacuate Sanaa due to clashes between tribesmen and security forces in Sanaa, Yemen, Thursday, May 26, 2011. Yemen's government said 28 people were killed in an explosion at a weapons storage site Thursday, but the opposition claimed military forces shelled a building used by tribal fighters who have risen up against President Ali Abdullah Saleh and warn of civil war if he refuses to step down. less 
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Associated Press | Photo By Saif Abduallah
Thu, May 26, 2011 4:37 PM EDT