By Eileen Martin ( May 30, 2019, 11:40 AM EDT) -- Years ago, I heard a statistic reporting that Toronto Pearson airport’s Pre-Clearance Operations, run by U.S. Customs and Border Protection, saw more business visitors annually than any other port of entry to the U.S. This is unsurprising considering the more than $14 billion in trade of goods and services annually between the two countries....