Be aware that animosity towards the US Navy is high in the town of Vieques. 100 protestors scrawled graffiti on the US Navy warship Yorktown July 17 in protest to their presence in the San Juan harbor. Though the Navy was invited for the San Juan Bay festival, demonstrators were nonetheless unhappy with their presence. Anti US Navy tensions in Vieques have been on the rise since April when US Marine Corp pilots dropped 2 bombs off target, killing a Vieques civilian. In May, the Navy admitted to firing multiple rounds of ammunition tipped with depleted uranium in violation of federal laws at Vieques back in February.