Plaintiffs-Appellants Jewel Hunter, et al. (“Appellants”) appeal the district court’s order granting summary judgment in favor of Defendant-Appellee Santa Fe Protective Services, Inc. (“Santa Fe”). Appellants sued Santa Fe on behalf of themselves and all others similarly situated and alleged both disparate treatment and disparate impact age discrimination claims in violation of the Age Discrimination in Employment Act of 1967 (“ADEA”), 29 U.S.C. § 621 et seq. Appellants argue that genuine issues of material fact remain on both their disparate impact and disparate treatment claims. They also challenge the district court’s failure to find that another case involving Santa Fe collaterally estopped the court from finding no genuine issues of material fact. 1

After reviewing the record, reading the parties’ briefs, and having the benefit of oral argument, we affirm the district court’s order granting summary judgment based upon its well-reasoned opinion filed on October 25, 2011.

AFFIRMED.