Construction workers Ryan Bell, left, and Shawna Smith, both electricians with the International Brotherhood of Electrical Workers Union, prep wire for installing at Union Station, which is undergoing an extensive renovation and expansion, in Denver, on Monday, April 8, 2014. After laying off two million workers during the recession, the construction industry now fears it may not have enough crews to keep up with demand for building projects. On April 8, 2014 in Denver, the Associated General Contractors of America announced a plan to deal with the shortage, including establishing charter schools focused on technical training, starting non-union apprenticeship programs and calling on Congress to pass immigration reform. (AP Photo/Brennan Linsley)