necessary for a party to have violated 18 U.S.C. §§ 2252(a) and 2252A. See e.g.. United States X-Citement Video, Inc., a al., 513 U.S. 64, 78, 15 S.Ct 464, 130 L.Ed.2d 372 (1994) (concluding that the Section 2252's use of the term 'knowingly' "extends both to the sexually explicit nature of the mater