We review the implications of adding a flavor doublet of color sextet quarks to QCD. Theoretical attractions include -- ``minimal`` dynamical symmetry breaking of the electroweak interaction, solution of the Strong CP problem via the ``heavy axion`` {eta}{sub 6}, and Critical Pomeron Scaling at asymptotic energies. Related experimental phenomena, which there may be evidence for, include -- production of the {eta}{sub 6} at LEP, large cross-sections for W{sup +}W{sup {minus}} and Z{sup o}Z{sup o} pairs and very high energy jets in hadron colliders, and a hadronic threshold above which high-energy ``exotic`` diffractive processes appear in Cosmic Ray events.

We review the implications of adding a flavor doublet of color sextet quarks to QCD. Theoretical attractions include -- minimal'' dynamical symmetry breaking of the electroweak interaction, solution of the Strong CP problem via the heavy axion'' [eta][sub 6], and Critical Pomeron Scaling at asymptotic energies. Related experimental phenomena, which there may be evidence for, include -- production of the [eta][sub 6] at LEP, large cross-sections for W[sup +]W[sup [minus]] and Z[sup o]Z[sup o] pairs and very high energy jets in hadron colliders, and a hadronic threshold above which high-energy exotic'' diffractive processes appear in Cosmic Ray events.