How did the government monitor individuals who posed a threat to national security prior to the 1970s?

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?

American indians in the blank built longhouses options -north west -great plains -south east -eastern woodlands q#2 american indians in the blank celebrated with a potlatch options same as before!

Afoot has beats. a) one b) two c) three d) four