EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, sits on the ground after being shot in the head with a rubber bullet fired by Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

Palestinian youths throw stones at Israeli troops during a protest against Israel's controversial separation barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, is tended to by Palestinian medics after he was shot in the head with a rubber bullet fired by Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A Palestinian man with a pin of late Palestinian leader Yasser Arafat takes part in a protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A Palestinian youth uses a sling to throw rocks at Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, reacts after being shot in the head with a rubber bullet fired by Israeli troops during a protest against Israel's controversial separation barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A Palestinian youth uses a sling to throw rocks at Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

Palestinian youths throw stones at Israeli troops during a protest against Israel's controversial separation barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, sits on the ground after being shot in the head with a rubber bullet fired by Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A Palestinian youth uses a sling to throw rocks at Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, is tended to by Palestinian medics after he was shot in the head with a rubber bullet fired by Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

A Palestinian youth holds a Palestinian flag during a protest against Israel's controversial barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK) 

A Palestinian throws stones at Israeli troops during a protest against Israel's controversial separation barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK) 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, sits on the ground after being shot in the head with a rubber bullet fired by Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin February 22, 2008. REUTERS/Yannis Behrakis (WEST BANK) 

Israeli soldiers stand guard during a protest against Israel's controversial separation barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK) 

Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, reacts after being shot in the head with a rubber bullet fired by Israeli troops during a protest against Israel's controversial separation barrier near the West Bank village of Bilin February 22, 2008. REUTERS/Eliana Aponte (WEST BANK)