This is what a DOD spokesperson said about troops sleeping on the floor...

In a piece about the National Guard troops sleeping on the floor, a DOD spokesperson was quoted as saying:

“The situation is pretty fluid right now. The soldiers you saw in the photo were resting as they were not currently on mission and due to the fluid security situation, it was deemed too dangerous for them to travel to better accommodations. The Soldiers have ready access to food and water as needed.” 

Let me understand this—the National Guard is needed to control the protests but is not able to travel.