First ever X-ray in the US was performed on the invention of Ukrainian scientist...
“On January 19, 1896, young Eddie McCarthy of Hanover fell while skating on the Connecticut River and fractured his left wrist”....
George Kistiakowsky: Ukrainian who made Manhatten Project work and first Atomic bomb explode
The US Government called on Dr. Kistiakowsky to help solve the problem with the new weapon the physicists at Los Alamos...