It was the military that used glow sticks, yes.
I will preface my remarks by re-emphasizing that we were very cautious with the moneys we spent, and we came in well under budget, partly because of the cautious approach, the frugal approach, if you will, that we took.
Specifically on glow sticks, they are a non-electric, low-level light source. We all know what glow sticks are; a lot of kids use them at Halloween, etc. That's clearly not what we use them for.
The fact that they are non-electric means they can be used in any environment, including close to flammable materials and explosives, and the fact that they are non-electric means they are more reliable. Batteries don't run out. Flashlights don't break.
We use glow sticks primarily for safety reasons. They mark fence lines. They mark trenches, if we are in combat operations. They'll mark wires. They'll mark all sorts of hazards. They'll mark trails for us in night operations.
In domestic operations you can appreciate that all of that becomes even more important, because we are in and among the community. Even though we may be in a wooded area that's dark, the chances of a community member coming into that area is quite high. We did not want them to be walking into fence lines or tripping over wires, or walking into our tents—or, even worse, driving into our tents. Therefore, we used glow sticks for safety, for illumination purposes at nighttime.