President Joe Biden on Tuesday defended what was widely perceived as a poorly handled pullout of U.S. troops from Afghanistan, while signaling that the end of the 20-year war will help the United States focus more on new challenges posed by China.In his first public remarks since the last U.S. military plane left Afghanistan's capital Kabul on Monday, Biden hailed the operation to evacuate American citizens and locals who worked alongside the United States during the war as an "extraordinary success."The final weeks of the pullout, however, were marred by chaotic images of Afghans desperate…READ FULL ARTICLE