Participants deflate balloons in hope of neutralizing and demolishing nuclear warheads, during a memorial gathering at Peace Park in Nagasaki, southern Japan Friday, January 22, 2021. The first-ever treaty to ban nuclear weapons entered into force on Friday, hailed as a historic step to rid the world of its deadliest weapons but strongly opposed by the world's nuclear-armed nations. (Photo by Kyodo News via AP Photo)
