For more than a year, Sister Megan Rice, 85, a Roman Catholic nun of the Society of the Holy Child Jesus, had caught occasional glimpses of the glittering World Trade Center from her living quarters: the Metropolitan Detention Center, a federal prison on the Brooklyn waterfront.

So when the Volvo she was riding in one morning last week crested the Verrazano-Narrows Bridge and the skyscraper came into full view, it made a strong impression.

“Oh, my gosh,” Sister Rice exclaimed. Drinking in the scenery and the panorama of New York Harbor, she added, “We’re well on our way.”

It was her fifth day of freedom after two years behind bars for a crime for which she is boldly unapologetic. In 2012, she joined two other peace activists in splattering blood and antiwar slogans on a nuclear plant in Tennessee that holds enough highly enriched uranium to make thousands of nuclear warheads. All three were convicted and sent to prison. But on May 8, an appellate court ruled that the government had overreached in charging them with sabotage, and ordered them set free.