The group scaled the wall of the Kleine Brogel air base in Belgium to protest against nuclear weapons.Read more
Pyongyang sees nuclear arms as key to "regime survival", the US national intelligence director says.
American atomic scientists created the Doomsday Clock in 1947 at the time of the Cold War, as a metaphor for global apocalypse. The hands of the clock are moved once a year, depending on how scientists view the threat to humanity's existence from technology and ourselves. The closer to midnight, the closer we are to self-destruction. Last year the clock was moved to two minutes to midnight. This year, the hands are in the same place. So we're no closer to blowing ourselves up. Sharon Squassoni is from the Bulletin of the Atomic Scientists, which sets the hands.
The Bulletin of the Atomic Scientists' Doomsday Clock suggests the world is as close to disaster as ever.
The flares made in the 1960s would have warned of approaching radioactive fallout.