The Mistakes of the Soviet Spy Network

The brass made various wrong estimates of when the Soviets would get the A bomb. Eloise Page was one of a number of officers who was fighting against those estimates and pushing for more surveillance. She actually ends up being right on several other operations as well. We see that for Sputnik, because she has agents that she is working with in Soviet scientific circles,.She knows exactly when Sputnik is going to launch and exactly its trajectory.