Protests came to a head in 1999 when Vieques native David Sanes, a civilian employee of the United States Navy, was killed by a jet bomb that the Navy said misfired. Sanes had been working as a security guard. A popular campaign of civil disobedience resurged; not since the mid-1970s had "Viequenses" come together en masse to protest the target practices. The locals took to the ocean in their small fishing boats and successfully stopped the US Navy's military exercises for a short period, until the US Navy and two US Coast Guard cutters began controlling access to the island and escorting boaters away from Vieques.