
    No. 73-2047.
    Buck et al. v. Impeach Nixon Committee et al.
   C. A. 7th Cir. Certiorari granted, judgment vacated, and case remanded to ascertain whether a case or controversy still exists, and, if so, for reconsideration in light of Lehman v. City of Shaker Heights, 418 U. S. 298 (1974).  