Jeff Ahring and Veronica Ahring, Single Persons,individually, and for and on Behalf of Childrenshayphane, Mandy, and Parker Ahring,plaintiffs-appellees-cross-appellants,andbrown & Root, Inc., Medical Plan, Plaintiff-intervenor-appellee, v. Truck Insurance Exchange, a Foreign Corporation, Defendant-appellantandstate Farm Mutual Automobile Insurance Company, a Foreigncorporation, Defendant-appellant-cross-appellee, 114 F.3d 1193 (9th Cir. 1997)