What were the short and long term effects of the dropping of the atomic bombs? (WW II)

(Radiation) because Radiation  last's very long such as many months, years etc.

Explanation:

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers