Washington (CNN) -- President Obama will announce Tuesday he'll deploy 30,000 additional U.S. troops to Afghanistan "at the fastest pace possible" with a goal of starting to withdraw forces from the country in July 2011. "The 30,000 additional troops that I am announcing tonight will deploy in the first part of 2010 ... so that they can target the insurgency and secure key population centers," Obama will say, according to excerpts from his speech at the U.S. Military Academy in West Point, New York. Obama will say that the additional U.S. forces "will allow us to accelerate handing over responsibility...