dy...." Wade v. U.S., 504 U.S. 181, 186, 112 S.Ct. 1840, 1844, 118 L.Ed.2d 524 (1992). It is reason- able and appropriate for the Government to con- sider Hoffenberg's truthfulness in evaluating his as- sistance. It is significant that Hoffenberg repeatedly corrected and changed his story and helped suborn perjury