On October 6, 2002, at 7:30 a.m., three Roman Catholic Dominican Sisters and members of the Sacred Earth and Space Plowshares action in 2001, Carol Gilbert, Jackie Hudson and Ardeth Platte, entered Minuteman missile silo site N-8 near Greeley, Colorado. Wearing white mop-up suits which said Disarmament Specialists and Citizens Weapons Inspection Team, they cut through two gates and entered the silo area. They hammered on the tracks used for the silo lids to open and on the silo itself. They also used their blood to make the sign of the cross on the tracks and on the silo. They then began defencing–cutting through the fence in three places. They concluded the witness with a liturgy.
Source: SACRED EARTH AND SPACE PLOWSHARES II. PlowSharesActions.org