Bush critics worry their protests will be shielded Tuesday, February 24, 2004 8:25AM EST The Associated Press CHARLOTTE, N.C. (AP) - Activists planning to protest President Bush's fund-raising visit on Thursday to Charlotte are concerned that they won't be allowed near him. Around the country, protesters say they've found themselves put in "free speech zones" at Bush appearances, out of sight of the president and the reporters covering him. The American Civil Liberties Union has sued to stop the practice. "If you're in a sea of people carrying signs that say, 'Yes,' you should be able to have a sign...