Because of the top quark’s very large mass, about 175 GeV, it now provides the best
window into flavor physics. Thus, pair–production of top quarks at the Tevatron Collider
is the best probe of this physics until the Large Hadron Collider turns on in the next
century. I will discuss aspects of the mass and angular distributions that can be measured
in tt production with the coming large data samples from the Tevatron and even larger
ones from the LHC.Accepted manuscrip