TAMPERING WITH A RECORD OR OTHERWISE IMPEDING AN OFFICIAL PROCEEDING.Section 1512 of title 18, United States Code, is amended--(1) by redesignating subsections (c) through (i) as subsections (d) through (j), respectively; and(2) by inserting after subsection (b) the following new subsection:`(c) Whoever corruptly--`(1) alters, destroys, mutilates, or conceals a record, document, or other object, o