WASHINGTON — The Senate Judiciary Committee on Thursday voted to extend until the end of 2013 three post-Sept. 11 terror-fighting practices that have raised concerns among civil liberties groups. At the same time, the legislation, which was approved on a 10-7, mainly party-line vote, would end in December 2013 the investigative tool known as National Security Letters that compel businesses to turn over customer records without a judge's order. Committee Chairman Patrick Leahy, D-Vt., sought to answer criticisms of the provisions that would be extended – two from the post-Sept.