2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48845We review some recent developments in the studies of direct CP violation and final state interactions in weak decays of heavy quarks.7 pages, RevTeX, invited talk at the DPF-99 conference, 5-9 January 1999, Los Angeles, CA; to be published in the proceedingsHigh Energy Physics - Phenomenologytext