For what good reason they may do it?
Maybe Gov Perry or AG Gregg Abbott can find out.
Here is a youtube of the event.
http://www.youtube.com/watch?feature=player_embedded&v=C1oP0QEu9RY#!
Near the end you can see a large group of people getting together for a debrief. None of them are wearing military uniforms so I’m assuming they are DHS etc. You can see dozens of nice guns on the porch near them.