THIS IS HOW IT ALL ENDS

85 Seconds to Midnight: What a Modern Nuke Would Actually Do

Putin says no one can guarantee nuclear weapons will never be used. The last U.S.-Russia arms treaty is gone, America is at war with Iran, and the Doomsday Clock is at 85 seconds to midnight. Here's what a modern nuclear weapon actually does — measured in Hiroshimas — from the triad and MIRVs to the Tsar Bomba, Sarmat, Burevestnik, Poseidon, EMPs, nuclear winter and the close calls that almost ended it all.

0:00 85 Seconds to Midnight
3:13 The Ruler: Hiroshima
4:24 How a Nuke Works
6:38 America's Arsenal
10:29 One Warhead Over Manhattan
12:42 Bigger Bombs
17:55 Beyond the Fireball: EMP & Nuclear Winter
19:48 Six Minutes to Decide
21:04 Close Calls
22:04 Are We Going to Die?

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