LONDON/NEW YORK/CHICAGO (Reuters) -From an office a 15-minute drive from Chicago's O'Hare International Airport, one small firm helped import millions of unauthorized Chinese-made vapes last year alone, forming a key link in the supply chain feeding U.S. demand for illegal e-cigarettes. In a little over four years, the firm, a customs brokerage run by a man named Jay Kim, became a go-to broker for the Chinese vape industry. The firm worked on 60% of all shipments of vapes and vape parts from China to the U.S. in 2024 registered by the Food and Drug Administration, according to a Reuters analysis.