The U.S. is considering a new kind of weapon to destroy a nuclear weapon.
The Pentagon’s new proposal calls for the development of a hydrogen bomb with a large enough yield to destroy the world’s largest city.
The military says the device is safe, but the U.N. Committee on the Peaceful Uses of Atomic Weapons says it has never seen a hydrogen weapon so powerful.
Here’s what you need to know.
(Monica Akhtar/The Washington Post)