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TO FROM SUBJECT: OPTIONAL, FORM NO. 56 A MAY 1982 EOITION GSA FPMR (4s Crm) 401-15.8 UNITED STATES GOVERNMENT Memorandum FILE (164-81) DATE: 12/20/71 SAC, SEATTLE Svus- ©€@ UNSUB, aka Dan Cooper S 7 R- M , NORTHWEST AIRLINES FLIGHT 335 PORTLAND TO SEATTLE 11/24/71 CAA ~ HIJACKING; EXTORTION /7i i talked tome.[ Washington Bankers Association, and bic requested him to send a bulletin to all of their members, requesting that they alert their employees to any large deposits in the amount of $20 denominations, any strange use of safe deposit boxes, large payments on notes or mortgages where bilis of $20 denomination in substantial numbers are used, and at the same time asked that they check these bills against the list of hijacked bills. JEM:e0n (1) SEARCHED, INDEXED... SERIAUIZED_(7o_ FILED —— DECZO 1971 FBI — SEATTLE Buy U.S. Savings Bonds Regularly on the Payroll Savings Plan DB Céoper-4841