Puzzle 21: 1950s Cold War & Civil Defense

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YSXYOUFRHBPNLAV ALARMXXUDRCIHIR SJFRTCONELRADRE TUNXNLYMCADCXRT ERWYFGYOQMRRTAE MAJLFBBSFUECZIM INDZXZEZAIKSPDI LIEZUARGLNNHMQS LUFIBVMBLOUERBO IMERHZFPOTBLAKD RNNGASTOUUFTDNO DUSKXTJJTLREAEO GLEBMJQRKPBRRRA GEIGERYQIGXYDIG QZIMCDYVJTNNGSZ
1.
SHELTER
2.
RADAR
3.
AIRRAID
4.
SIREN
5.
CONELRAD
6.
BUNKER
7.
FALLOUT
8.
DOSIMETER
9.
GRIZZLY
10.
DRILL
11.
PLUTONIUM
12.
URANIUM
13.
DEFENSE
14.
GEIGER
15.
ALARM