Breaking News update and fact checked to be sure.

Just tracking this lear jet comes as we were about to launch Rocket Lab classified launch as Luxton at NATO summit.
USAF C-37B (Gulfstream 550) arrived at RAAF Edinburgh from Nadi this afternoon a week ago.

Albeit travelling incognito, tracking devices identified it as 18-1942 (5586) from Andrews AFB, utilising the callsign SAM736. Almost as devoid of colour, but not quite as shy with its identity, Global 5000 T7-FHX (9676) arrived from Mumbai into Adelaide.
Although registered in San Marino, this aircraft is actually based at Dubai World in the UAE – Rod B
Before being in the Australia space jun at Matura was I. Edinburgh for tracking of
Boeing MQ-28 Ghost Bat

Payload suspected bunker buster weapons – known as Rod of God usually fired allegedly on the American version of the X1 space bomber.
Update March 2025 Australia expects to shoot a live weapon off its MQ-28 Ghost Bat before the end of the year, according to manufacturer Boeing’s defense chief at this year’s Avalon Air Show.
So NOT quite up to X1 level but consider aircraft cs designation still a big deal.
SAM736 is a Special Air Mission (SAM) flight, likely operated by the U.S. Air Force, and it can be tracked on FlightAware. The designation “SAM” is used when the aircraft is not carrying the President or Vice President, who would be designated as “Air Force One” or “Air Force Two” respectively. The Special Air Mission provides air transportation for high-ranking government officials and dignitaries. Guessing no VP but a CJS general. A BIG DEAL!!

Comes day before Rocket Lab classified payload launch
This is a bit of Worry!!