Megan Gillespie Rice, S.H.C.J., (Society of the Holy Child Jesus) is a nuclear disarmament activist, Roman Catholic religious sister (nun) and former missionary.
She is notable for breaking into the Y-12 National Security Complex in Oak Ridge, Tennessee, at the age of 82, with two fellow activists of the Transform Now Plowshares group.
The break in was a nuclear disarmament protest referred to as "the biggest security breach in the history of the nation's atomic complex."
Rice was sentenced to almost three years in prison.
In May 2015, the conviction for sabotage was vacated by a federal appeals court.
The appeals court ruled that the prosecution failed to prove that Rice and the two others had the intention of causing injury to the national defense system.
The lesser charge of injuring government property was upheld by the court but Rice was released within a week as the 2 years she had already served would be more than the re-sentencing for the upheld conviction.