of Japan, No. 02 Civ. 100238(DC), 2004 WL 307248, at *2 (S.D.N.Y. Feb. 17, 2004) (citing United States v. S.A. Empresa de Viacao Aerea Rio Grandense (Varig Airlines), 467 U.S. 797, 814, 104 S.Ct. 2755, 81 L.Ed.2d 660 (1984) (interpreting FTCA)). Generally, acts are discretionary if they are per- formed at the pla

of a discretionary function and cannot be the basis for overcoming SHC’s immunity. See U.S. v. S.A. Empresa de Viacao Aerea Rio Grandense WESTLAW (Varig Airlines), 467 U.S. 797, 814, 104 S.Ct. 2755, 81 L.Ed.2d 660 (1984) (explaining FTCA discretionary function exception is designed to “prevent judicial ‘second