Radiation and the terrific amount of destruction wasn't taken too much into consideration by the military and political leaders at this time.

I remember watching pictures of US soldiers walking through the smoke of a a-bomb test in 1949.

Basically, the A-bomb was just a new weapon replacing several 1,000 bomber raids with one single airdrop. The U.S. military considered to use it even tactically on a planned invasion of Japan to prepare the LZ.

In 1945, the WAllies had little reluctance to imply any method of force to end the killing and win the war in the ETO.

Cheers,

__________________
"Gentlemen! You can't fight in here, this is the War Room!"
(President Merkin Muffley in "Dr. Strangelove")