Two U.S. congressmen sent a letter Wednesday to James Dimon, CEO of JP Morgan Chase, that demanded details surrounding the recent loss of a data tape containing personal information on customers of the financial services firm. Republican Reps. Joe Barton of Texas and George Radanovich of California want to know how many customers were impacted, how many so far have been notified, whether all have been offered one year of free credit monitoring services and what those services entail. The tape went missing from one of JP Morgan Chase's off-site storage facilities, according to the letter. The lawmakers set an Oct. 31 deadline for a response. — DK