Mass. Sen. Brown writing a book about his life   Mich. Republican Ehlers will not seek re-election   US: Iran enrichment plan risks cancer patients   Rare earthquake rattles northern Ill.; no damage   Japan-U.S. alliance cannot be maintained by words 'Trust me'+   Oil pipeline bombed in Iraq   Rep. Vernon Ehlers of Michigan tells The AP he will not seek re-election to Congress in 2010.   Bernanke outlines plan for pulling in stimulus aid   New Report: $1 Cigarette Tax Increase Would Raise $18.6 Million for Montana and Cut Youth Smoking   New Report: $1 Cigarette Tax Increase Would Raise $46.4 Million for Idaho and Cut Youth Smoking   LEAD: 2009 U.S. trade deficit falls 45% to $380 bil., lowest since 2001+   Hospira Announces Expiration of Hart-Scott-Rodino Review Period for Acquisition of Orchid's Generic Injectable Pharmaceuticals Business   London to open 1st exercise area for older people   Chopper crashes during Sao Paulo rush hour, 1 dead   CORD:USE Cord Blood Bank Announces Partnership with Memorial Healthcare System   Sprint loss narrows but revenue misses expectations   Greek unions strike against austerity plan   Honda airbag fault fuels Japan's auto woes   15 killed in suicide attack on Pakistani paramilitary troops+   Medical University of South Carolina First To Test New Heart Imaging Method To Detect Coronary Artery Disease