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"The Russian Planes entered an ADIZ which applies ONLY to Commercial aircraft." You are dead wrong, probably because you relied on a half truth found in a Wikipedia article. The fact is that all aircraft entering a U.S. Canadian ADIZ is required to meet requirements regulating ingress and egress from the ADIZ, whether civil or state aircraft. Quote: AIM 7/24/14 Section 6. National Security and Interception Procedures 5-6-1. National Security a. National security in the control of air traffic is governed by 14 CFR Part 99. b. All aircraft entering domestic U.S. airspace from points outside must provide for identification prior to entry. To facilitate early aircraft identification of all aircraft in the vicinity of U.S. and international airspace boundaries, Air Defense Identification Zones (ADIZ) have been established. REFERENCE- AIM, ADIZ Boundaries and Designated Mountainous Areas, Paragraph 5-6-5. c. Operational requirements for aircraft operations associated with an ADIZ are as follows: 1. Flight Plan. Except as specified in subparagraphs d and e below, an IFR or DVFR flight plan must be filed with an appropriate aeronautical facility as follows: (a) Generally, for all operations that enter an ADIZ. (b) For operations that will enter or exit the U.S. and which will operate into, within or across the Contiguous U.S. ADIZ regardless of true airspeed. (c) The flight plan must be filed before departure except for operations associated with the Alaskan ADIZ when the airport of departure has no facility for filing a flight plan, in which case the flight plan may be filed immediately after takeoff or when within range of the aeronautical facility. 2. Two-way Radio. For the majority of operations associated with an ADIZ, an operating two-way radio is required. See 14 CFR Section 99.1 for exceptions. 3. Transponder Requirements. Unless otherwise authorized by ATC, each aircraft conducting operations into, within, or across the Contiguous U.S. ADIZ must be equipped with an operable radar beacon transponder having altitude reporting capability (Mode C), and that transponder must be turned on and set to reply on the appropriate code or as assigned by ATC. In the case of state aircraft, which includes Russian military aircraft, DCAS procedures are applicable. See: Clearance, Overflight, and Landing of U.S. and Foreign State Aircraft U.S. and foreign State aircraft are exempt from overflight fees. Read the U.S. Diplomatic Clearance and Landing Authorization Procedures Guide for information about how to request a diplomatic clearance to overfly or land in the U.S. Register and apply at least 72 working hours in advance via the Diplomatic Clearance Application System (DCAS). My USAF F-102 Delta Dagger fighter-interceptor group always intercepted foreign state aircraft penetrating the ADIZ who did not comply with the diplomatic clearance and flight plan procedures.