On 24MAR1992, the Treaty on Open Skies was created as a way of being sure that countries that have military weapons (military-grade arms) control agreements are complying.  However, it wouldn’t be until 01JAN2002 that Open Skies actually went into effect, with 34 countries signed-on (but only 20 ratified).  Interestingly, the first OC-135B was ready to launch in June 1993!

On 22NOV2020, the United States officially withdrew from the Treaty on Open Skies, so far the only country to do so.  It’s interesting that the many countries who did not sign-on to Open Skies, like nuclear armed China, condemned the U.S. withdrawal.

But it is more complicated than U.S. President Donald Trump being a mean old ‘orange man’, it’s about other treaty signators not complying, and the fact that updating the now ‘ancient’ observation technology is just too cost prohibitive for taxpayers.

Here’s a North Atlantic Treaty Organization (NATO) video, 22MAY2020, in which NATO accuses Russia (Rossiyskaya Federatsiya) of violating the Open Skies agreement:

From 1992-93, three WC-135B aircraft were modified for the Open Skies mission, re-designated OC-135B.   For some reason, after only a few years based at Offutt Air Force Base (AFB), Nebraska, the first OC-135B was sent straight to ‘moth-balls’ at Davis-Monthan AFB, Arizona, in 1997.

Despite the OC-135Bs being used on other non-Open Skies observations, such as natural disasters, according to some reports the remaining two OC-135Bs are now available for sale as a result of the U.S. exit from Open Skies: “We’ve started liquidating the equipment. Other countries can come purchase or just take the airframes. They are really old and cost-prohibitive for us to maintain. We don’t have a use for them anymore.”

What many people might not know is that the Open Skies operation required the use of old school film technology.  In this 2015 U.S. Air Force video report, by John Harrington, it’s revealed that the old technology was getting difficult to maintain due to no new parts:

Here is an October 2016 USAF video (by John Harrington) explaining how the imagery captured by the OC-135Bs are processed:

23NOV2020: Russia warns remaining Open Skies members not to share data with United States

11NOV2020: French personnel to use Romanian An-30 for Open Skies flyover of Russia

Realize that the United States and Russia have always conducted observation flights of each other, Open Skies was just an attempt to make it more militarily non-threatening.

28NOV2020: Russian Sukhoi 27 scrambled to intercept U.S. RC-135 over Black Sea

27NOV2020: Russia accuses NATO of conducting more than 1300 non-Open Skies spy flights

There were rumors that the two remaining Open Skies OC-13Bs were up for sale in 2020, however, the aircraft were given a fresh ‘Open Skies’ paint job and sent to the ‘boneyard’ in Arizona. USAF video by David Farley, 13MAY2021:

July 2022: NATO-Romania puts to use an ex-Open Skies Antonov 30.

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