You can run, but you'll only die tired....

I'm a firm believer in conducting extensive advance work when given a protective service assignment. While the Barrett sniper rifle is meant to be used by the good guys, videos like this always help reinforce the notion there is no security from a sniper in a brick building or an armored car. The only thing that brings your protectee home at the end of the day is well-thought out and expertly carried out advance work.