NATO protests

Protesters dressed up as clowns are stopped by police in Strasbourg. French police fired teargas and water cannon to force back anti-North Atlantic Treaty Organization protesters on the outskirts of the city and cordoned off the city center ahead of the NATO summit.

• Photos: Obama in Europe
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• Complete coverage: Obama at the G20 and NATO Summits  (Sebastien Bozon / AFP/Getty Images)

An anti- NATO activist hurls stones during clashes with riot police in Strasbourg. Protesters said tensions had risen after police wounded one man with a rubber bullet in clashes with hundreds of anti-NATO activists and youths from the suburbs.

• Photos: Obama in Europe
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• Complete coverage: Obama at the G20 and NATO Summits  (Michel Spingler / Associated Press)

Police arrest a protester at a demonstration against the NATO summit in Baden-Baden, Germany, where NATO leaders held a working dinner.

• Photos: Obama in Europe
• Photos: G20 protests
• Complete coverage: Obama at the G20 and NATO Summits  (Carsten Koall / Getty Images)

An anti- NATO activist throws a piece of wood onto a burning barricade during clashes with a squad of riot police in Strasbourg, France.

• Photos: Obama in Europe
• Photos: G20 protests
• Complete coverage: Obama at the G20 and NATO Summits  (Michel Spingler / Associated Press)