Purolator International, which specializes in U.S.-Canadian logistics, will add locations in Columbus, Ohio; Newark, N.J.; and Phoenix during the first quarter of the year, after opening seven U.S. locations in 2012. The company is trying to tap into the significant trade activity between the United States and Canada. Nearly 20 percent of U.S. exports went to Canada in 2011, and total trade between the countries accounted for more than $680 billion in 2011, accordin...