Test Missions: The E-4B conducts regular test flights to ensure operational readiness. One of 3 planes that are always on standby! They have to fly it doesnt mean anything though..

Much more worrisome would be the Nuke sniffers, watch these planes

The WC-135 Constant Phoenix is a special-purpose aircraft derived from the Boeing C-135 Stratolifter and used by the United States Air Force. Its mission is to collect samples from the atmosphere for the purpose of detecting and identifying nuclear explosions. It is also informally referred to as the "weather bird" or "the sniffer" by workers on the program and international media respectively

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Greenland without its ice sheets.

The longest known canyon on Earth, hidden under the icy sheet, right there in the middle of Greenland.

We can all agree that's some dramatic terrain with a mega-canyon that's deeper than the Grand Canyon.

Key Comparisons:
🔑Length — Nearly twice as long as Arizona's Grand Canyon (446 km / 277 miles).
🔑Depth — Up to 800 meters (2,600 feet) in places—comparable to parts of the Grand Canyon but shallower than its maximum depth of about 1,857 meters (6,093 feet).
🔑Width — Up to 10 km (6 miles) wide.
This makes it the LONGEST KNOWN CANYON ON EARTH.

🛰️Right where this mega-canyon meets the sea in northwest Greenland sits Pituffik Space Base—the U.S. Space Force's northernmost installation.
📡It hosts a massive phased-array radar for the Ballistic Missile Early Warning System, feeding real-time data to NORAD for detecting ICBMs/SLBMs over the Arctic polar route—critical for North American defense.

https://x.com/i/status/2009300655232401431

From 2013

NASA Data Reveals Mega-Canyon under Greenland Ice Sheet - NASA

https://www.nasa.gov/missions/icebridge/nasa-data-reveals-mega-canyon-under-greenland-ice-sheet/