How did the US dropping the atomic bomb add to the cold war tension between the US and USSR?

Because the Americans were the first people to do it.

In August 1945 the USA detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki. The intention was to force Japan to surrender, thus avoiding a long war in the Pacific. This action had the added potential of pressurizing the USSR into negotiating over Eastern Europe and Germany.

the central bank of the united states.

i believe we're not a republic so that is a hard question