A demonstrator receives help and attention after suffering the effects of a flash bang following clashes with police during an Occupy Oakland protest in Oakland

 
A demonstrator receives help and attention after suffering the effects of a flash bang following clashes with police during an Occupy Oakland protest in Oakland
A demonstrator receives help and attention after suffering the effects of a flash bang following clashes with police during an Occupy Oakland protest on May Day in Oakland, California, May 1, 2012. REUTERS/Beck Diefenbach (UNITED STATES - Tags: CIVIL UNREST BUSINESS EMPLOYMENT POLITICS)