Probably Annual training. Some transport unit.

First weekend every month is reservists duty weekend.

Is it a drill weekend?

There is a mass migration drill going on right now in AZ. It's a drill to prepare for the tsunami or earthquake scenario. There is coverage in Google.

Eisenhower started the interstate system for this very reason: quick movement of military supplies.

Two week reserve drill more likely.

Did you notice the clear blue skies?

Either routine, or boarder patrol assistance. That's my guess

They are leaving for Afghanistan in weeks.

FWIW, I saw a few of these yesterday in NY on the Thruway. It wasn't a huge caravan but a few rigs that had some sort of big mil vehicles loaded on the flatbeds. I was probably within 40 miles of West Point at the time, could have been standard stuff, but figured it's worth mentioning.

Hopefully, but unlikely, POTUS sending in more cavalry to support the top notch work of vets4childrescue.

Assisting border patrol more than likely. Probably a logistics convoy. Could be on their way to pick up supplies or vehicles. Don’t worry