Jeb Bush is showcasing his tenure as a two-term governor and driving home the argument that firsthand experience matters more than high-flying rhetoric, as he tries to break past the crowded field of Republican presidential contenders. Visiting a Michigan plant that manufactures antidotes for medical emergencies and bioterrorism threats, Bush recalled dealing with the 2001 anthrax attack that killed five people in Boca Raton, Florida, not long after the 9/11 attacks.