"J. Robert Oppenheimer: Our one hope is that Hitler is so, so blinded by hate that he's denied Heisenberg proper resources, because it'll take vast resources. Our nation's best scientists working together. Right now they're scattered. Leslie Groves: Which gives us compartmentalization. J. Robert Oppenheimer: All minds have to see the whole task to contribute efficiently. Poor security may cost us the race. Inefficiency will. The Germans know more than us anyway. Leslie Groves: The Russians don't. J. Robert Oppenheimer: Remind me, who are we at war with? Leslie Groves: Somebody with your past doesn't want to be seen downplaying the importance of security from our communist allies. J. Robert Oppenheimer: Point taken, but no."