 For about fifteen years following its publication, the EPR paradox was discussed at the level of a thought experiment whenever the conceptual difficulties of quantum theory became an issue. In 1951 David Bohm, a protégé of Robert Oppenheimer and then an untenured Assistant Professor at Princeton University, published a textbook on the quantum theory in which he took a close look at EPR in order to develop a response in the spirit of Bohr. Bohm showed how one could mirror the conceptual situation in the EPR thought experiment by looking at the dissociation of a diatomic molecule whose total spin angular momentum is (and remains) zero; for instance, the dissociation of an excited hydrogen molecule into a pair of hydrogen atoms by means of a process that does not change an initially zero total angular momentum (Bohm 1951, Sections 22.15–22.18). In the Bohm experiment the atomic fragments separate after interaction, flying off in different directions freely to separate experimental wings. Subsequently, in each wing, measurements are made of spin components (which here take the place of position and momentum), whose measured values would be anti-correlated after dissociation. In the so-called singlet state of the atomic pair, the state after dissociation, if one atom’s spin is found to be positive with respect to the orientation of an axis perpendicular to its flight path, the other atom would be found to have a negative spin with respect to a perpendicular axis with the same orientation. Like the operators for position and momentum, spin operators for different non-orthogonal orientations do not commute. Moreover, in the experiment outlined by Bohm, the atomic fragments can move to wings far apart from one another and so become appropriate objects for assumptions that restrict the effects of purely local actions. Thus Bohm’s experiment mirrors the entangled correlations in EPR for spatially separated systems, allowing for similar arguments and conclusions involving locality, separability, and completeness. Indeed, a late note of Einstein’s, that may have been prompted by Bohm’s treatment, contains a very sketchy spin version of the EPR argument – once again pitting completeness against locality (“A coupling of distant things is excluded.” Sauer 2007, p. 882). Following Bohm (1951) a paper by Bohm and Aharonov (1957) went on to outline the machinery for a plausible experiment in which entangled spin correlations could be tested. It has become customary to refer to experimental arrangements involving determinations of spin components for spatially separated systems, and to a variety of similar set-ups (especially ones for measuring photon polarization), as “EPRB” experiments—“B” for Bohm. Because of technical difficulties in creating and monitoring the atomic fragments, however, there seem to have been no immediate attempts to perform a Bohm version of EPR.