Well, yeah.
He had spies deep inside both the US and UK atomic weapons programs. Truman at that time was still just the newest of Three Vice Presidents that FDR had while he was in office.
That should be rather obvious. Stalin knew even before the Germans surrendered. Truman did not learn of it until he became President. But it was one of the very first things he was told about once he assumed the office.
"Truman....was still just the newest of Three Vice Presidents that FDR had while he was in office."
Not the reason.
FDR was in thrall to Stalin.....that's the reason.
Same reason today's Democrat Party is closer to Lee Harvey Oswald than the views of John F Kennedy.
1. US Army Maj. George Racey Jordan was a Lend-Lease 'expediter' who couldn't understand the volume or priority nature of the shipments to the USSR....including 'secret cargo' hidden under 'diplomatic immunity.'
a. "The President has directed that 'airplanes be delivered in accordance with protocol schedules by the most expeditious means.' To implement these directives, the modification, equipment and movement of Russian planes have been given first priority, even over planes for US Army Air Forces." From the diaries of Maj. George Racey Jordan, supervisory 'expediter' of Soviet Lend-Lease aid, p. 20.
2. A simple businessman, in his 40's, who had flown with Eddie Rickenbacker in WWI, Jordan loved his country more than the Establishment, and became what ex-Socialist Max Eastman called the 'moral aristocracy.' West, "American Betrayal," p.119.
3. In his capacity, he worked closely with Soviet chief, Col. Anatole Kotikov. With them at their apartment, he noticed Kotikov's wife-secretary pull her huband's "Experimental Chemicals" dossier from "a hiding place under the mattress, while her husband was pulling on his handsome boots of black leather." Jordan, "From Major Jordan's Diaries, " p.47
a. In the file was a list of everything necessary to produce a 'brand-new and experimental atomic pile, courtesy of Lend-Lease." West, Op. Cit.
b.
c. "... he was instructed by the White House and State Department to deliver parts for the atomic bomb to the Soviets – at the same time the nation was worried about Russia stealing A-bomb secrets. At first, Congress did not believe him, but his diary filled with dates, shipping manifestos, and names of pilots who flew the missions,..."
Major George Jordan
4. In Jordan's book is a near-complete list of Soviet Lend-Lease material
a. According to Jordan, shipments to the USSR via Lend-Lease continued until 1949.
Victory in Europe Day—known as
V-E Day or
VE Day—was the public holiday celebrated on 8 May 1945 (in
Commonwealth countries, 7 May 1945) to mark the date when the
World War II Allies formally accepted the
unconditional surrender of the armed forces of
Nazi Germany
5. ATOMIC MATERIALS
Beryllium Metals 9,681 lbs. -- $ 10,874.
Cadmium alloys 72,535 lbs. -- $70,029.
Cadmium metals 834,989 lbs. - $71,466.
Cobalt ore & concentrate 33,600 lbs. -- $49,782.
Cobalt metal & cobalt-bearing scrap 806,941 lbs. -- $1,190,774.
Uranium metal 2.2 lbs. -
Aluminum Tubes 13,766,472 lbs. -- $13,041,152.
Graphite, natural, flake, lump or chip 7,384,282 lbs. -- $812,437.
Beryllium salts & compounds 228 lbs. -- $775.
Cadmium oxide 2,100 lbs. -- $3,080.
Cadmium salts & compounds, n.e.s. * 2 lbs. -- $19.
Cadmium sulfate 2,170 lbs. -- $1,374.
Cadmium sulfide 16,823 lbs. -- $17,380.
Cobalt nitrate 51 lbs. -- $48.
Cobalt oxide 17,800 lbs. -- $34,832.
Cobalt salts & compounds n.e.s. 11,475 lbs. -- $7,112.
Cobaltic & cobaltous sulfate 22 lbs. -- $25.
Deuterium oxide (heavy water) -- $1,100 grs. -
http://seawaves.us/na/web4/diaries.html#CHAPTER_NINE_