What follows is an opinion from the Supreme Court of the United States. Your task is to identify the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed. The information relevant to this variable may be found near the end of the summary that begins on the title page of each case, or preferably at the very end of the opinion of the Court. For cases in which the Court granted a motion to dismiss, consider "petition denied or appeal dismissed". There is "no disposition" if the Court denied a motion to dismiss.

Opinion:
CALIFORNIA et al. v. UNITED STATES et al.
No. 87-1165.
Argued November 28, 1988
Decided June 12, 1989
Jerome C. Muys argued the cause for petitioners. With him on the briefs were Warren J. Abbott, Fred Vendig, Karen L. Tachiki, James F. Roberts, Justin McCarthy, John K. Van de Kamp, Attorney General of California, R. H. Connett and N. Gregory Taylor, Assistant Attorneys General, and Douglas B. Noble, Deputy Attorney General, Robert K. Corbin, Attorney General of Arizona, and Anthony B. Ching, Solicitor General.
Edwin S. Kneedler argued the cause for the United States. With him on the brief were Solicitor General Fried, Assistant Attorney General Marzulla, Deputy Solicitor General Wallace, Edward J. Shawaker, and Sarah P. Robinson. Dale T. White argued the cause for the tribal respondents. With him on the brief were William E. Strickland and Scott B. McElroy.
Richard Dauphinais filed a brief for the Klamath Tribe et al. as amici curiae urging affirmance.
Per Curiam.
The judgment below is affirmed by an equally divided Court.
Justice Marshall took no part in the consideration or decision of this case.

Question: What is the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed?

Choices:
stay, petition, or motion granted
affirmed (includes modified)
reversed
reversed and remanded
vacated and remanded
affirmed and reversed (or vacated) in part
affirmed and reversed (or vacated) in part and remanded
vacated
petition denied or appeal dismissed
certification to or from a lower court
no disposition

Answer: 1