Sens. John Kerry (D-Mass.) and Barbara Boxer (D-Calif.) and nine Senate supporters kicked off the autumn global warming debate today with a campaign-style rally releasing their comprehensive climate bill. "We know clean energy is the ticket to strong, sustainable economic growth," Boxer, the chairwoman of the Environment and Public Works Committee, said at the Capitol Hill event, in front of a large American flag and three dozen or so military veterans, business leaders and environmentalists. "Ultimately, this bill is about keeping Americans safe," added Kerry, the chairman of the Foreign Relations Committee.