BOSTON/NEW YORK (Reuters) - Weakening demand in the United States and Europe has spooked some in corporate America, prompting big companies to throttle back their spending just as U.S. government looks for ways to cut its own outlays. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=EnxlEqJPaNQ:GPmhCSEfH10:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=EnxlEqJPaNQ:GPmhCSEfH10:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/EnxlEqJPaNQ)