In this Dec. 20, 2012 photo, a builder works in North Andover, Mass., where condominium units are under construction. Spending on U.S. construction projects rose in December, ending a year in which construction activity increased for the first time in six years. (AP Photo/Elise Amendola)

Associated Press
In this Dec. 20, 2012 photo, a builder works in North Andover, Mass., where condominium units are under construction. Spending on U.S. construction projects rose in December, ending a year in which construction activity increased for the first time in six years. (AP Photo/Elise Amendola)
In this Dec. 20, 2012 photo, a builder works in North Andover, Mass., where condominium units are under construction. Spending on U.S. construction projects rose in December, ending a year in which construction activity increased for the first time in six years. (AP Photo/Elise Amendola)
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