Tighter border controls and visa delays have cost U.S. firms tens of billions of dollars in lost contracts and added expenses, particularly in fast-growing new markets in China and other developing countries, according to a study to be released today. The analysis by eight leading business groups represents the first corporate effort to quantify the economic effect of the tightening of America’s borders after the Sept. 11, 2001, terrorist attacks. Companies have been reluctant to publicly criticize the U.S. homeland security campaign, in part because they fear they would be accused of jeopardizing America’s safety or would run afoul of government officials. Full Story