Which military alliance did the western bloc of nations form to defend against soviet aggression after world war 2

a. the organization of american states
b. the north atlantic treaty organization
c. the warsaw pact
d. the united nations

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.