I am not sure what the criteria is to have flags flown at half-staff.
Growing up, it seemed to be for really important deaths -- for example, President Kennedy.
Now it seems like whenever a governor or president feels like it. I wonder if they do it to make themselves seem like they are real caring people?
The killings Friday in Colorado, for example, are truly tragic, but do they deserve the flags flown half-staff? If so, then I would think that anytime the U.S. has a soldier killed in the wars we are in would be one of the best reasons to fly our flags half-staff.