Conviction and sentence for attempting to entice a minor to engage in a criminal sexual act is affirmed where: 1) the ten-year mandatory minimum sentence provision of 18 U.S.C. sec. 2422(b) does not violate the Fifth Amendment as there is a rational basis for withholding the safety valve provision of 18 U.S.C. sec. 3553(f) from those who violate the statute; and 2) the mandatory minimum sentence provision does not violate the Eighth Amendment as it is not grossly disproportionate to defendant's offense.