BTA is North America’s premier authority on issues affecting the U.S. northern and southern borders, representing a large grassroots network of over 4.2 million public and private sector representatives, including business leaders, chambers of commerce and industry, academic institutions, economic development corporations, industrial parks, transport companies, customs brokers, defense companies, manufacturers and state and local government agencies.BTA is North America’s premier authority on issues affecting the U.S. northern and southern borders, representing a large grassroots network of over 4.2 million public and private sector representatives, including business leaders, chambers of commerce and industry, academic institutions, economic development corporations, industrial parks, transport companies, customs brokers, defense companies, manufacturers and state and local government agencies.