Yoshito Matsushige’s photographs Hiroshima’s destruction are among the most harrowing visual records of the nuclear age.

An article sent by Los Alamos National Laboratory director Siegfried Hecker to lab employees in 1995, on the 50th anniversaries of the bombings of Hiroshima and Nagasaki.

By instituting a two-person rule for US nuclear weapons use, Donald Trump will have single-handedly reduced the danger of ...

Siegfried Hecker, former director of the Los Alamos National Laboratory, expresses concern that, 80 years after the bombings ...