Just think, of all the sheriff dept.& city police & state trooper divisions that have motorcycle patrols, not one of them (in the USA), with all their risk management studies, even ALLOW their officers to wear a full face helmet. I guess they never experience high speeds, quick and/or unexpected maneuvers, or ever go down.
Come to think of it, their official, assigned uniforms never include any of those pretty little riding leathers, assless chaps, or other horsecrap many others think are "necessary", wouldn't leave home without it items.
