  The collisions of large nuclei at high energies could produce metastable
vacua which are odd under parity, P, charge conjugation, C, and/or CP. Using
only the three-momenta of charged pions (or kaons), we show how to construct
global observables which are odd under P, C, and CP, and which can be measured
on an event by event basis. Model dependent estimates of the P-odd observables
are on the order of 10^(-3).
