" Finally, Rønneberg, the leader of Gunnerside and the last surviving saboteur, who was ninety-six years old in 2016, often spoke eloquently about why he braved the North Sea to be trained in Britain and why he then returned, twice, by parachute, to Norway. “You have to fight for your freedom,” he said. “And for peace. You have to fight for it every day, to keep it. It’s like a glass boat; it’s easy to break. It’s easy to lose. "

― Neal Bascomb , The Winter Fortress: The Epic Mission to Sabotage Hitler’s Atomic Bomb