fatal curse on J.F.K.); LEITER (14D. First pitcher to have defeated all 30 major-league teams); DERALTE (40D. 20th-century German leader's moniker); PILATES (17A. Conditioning system); DORA (21A. 1920s birth control advocate Russell); PEROT (22A. Author of "Save Your Job, Save Our Country: Why Nafta Must Be Stopped -- Now!"); ALROSEN (33A.