Six years of recession in the U.S. has cut a $1.2 trillion-a-year construction industry into one that is worth about $800 billion a year. It also chopped more than 2 million jobs from the industry, according to data from the Associated General Contractors (AGC) of America. However, a survey by AGC and co-sponsored by Computer Guidance leads AGC to look at 2013 as a potential turning point with tentative signs of recovery.