Police reveal sniper letter: "your children are not safe anywhere at any time." Link between sniper and bus driver shooting sought. news_sniper_bus_1022_abc.jpg l Kids "Not Safe" http://abcnews.go.com/sections/us/videofiles/Video/021023sniper_video.ram 10352990334420 abcnews.gif video.gif http://abcnews.go.com/sections/us/videofiles/Video/021023sniper_video.ram 10352990334421 Latest Video Report lock_icon.gif webpage.gif http://abcnews.go.com/ 10352990334422 More Sniper News lock_icon.gif lock_icon.gif big_headline