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Prompted by hijacking U.S. flag air carriers, the Treasury and Transportation departments initiate a crash AIR SECURITY PROGRAM with U.S. Customs, designated as lead.

CUSTOMS begins its CANINE PROGRAM with ex-military sentry dogs and handlers; training takes place at Lackland Air Force Base in Texas, where preparing a dog for Customs operations takes approximately 2 months.

TREASURY ENFORCEMENT COMMUNICATIONS SYSTEM (TECS) begins operations with 20 terminals at the San Ysidro port of entry. TECS provides instantaneous information to aid in detection of violations, enforcement data to evaluate programs & performance, statistics for the allocation of resources and data for intelligence on violation patters, modus operandi & profiles.

Wednesday, December 31, 1969 - 19:00
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1971 - Sky Marshals training at Fort Belvoir, Virginia
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1971- Sky Marshals training at Fort Belvoir, Virginia: At the close of the program in June 1974, most CSO's were accepted as Customs Patrol Officers, Special Agents, Inspectors, as well as various non-enforcement positions.