I wrote this poorly, Truman APPROVED the Berlin Airlift (breaking the blockade); Of course he also APPROVED the atomic bombing of Japan. Sorry, I’ve been having some health problems and my writing has suffered from it. I don’t know enough about the decision to use the Atomic bomb. The difference between the two issues is that Truman inherited the Atomic issue from FDR, while the Berlin Blockade was entirely his issue. No one, from what I’ve read, could have predicted the blockade until after the end of WWII.
But why would you be "discouraged" that Truman approved the Berlin Airlift?
BTW, I am 100% OK with the decision to deliver the Gifts For the Empire of Japan in Furtherance of World Peace to Hiroshima and Nagasaki.