Court of Appeals for the First Circuit December 1, 1998, 98-1889 (William L. Fischbein and Cesar G. Manent, Individually and on Behalf of a Class of Persons Similarly Situated v. First Chicago Nbd Corporation)

POSNER, Chief Judge.

The plaintiffs appeal from the grant of summary judgment to the defendant in a diversity breach of contract suit governed by Delaware law. The facts are not in dispute, and we offer an abbreviated and simplified summary. The plaintiffs were employed by First Chicago Corporation.