The United States and Canada share a border of nearly 5,525 miles. U.S. Customs and Border Protection (CBP), within the Department of Homeland Security (DHS), is responsible for securing the borders while facilitating trade and travel. CBP launched the Free and Secure Trade (FAST) program in 2002 to expedite processing for pre-vetted, low-risk shipments. GAO was requested to assess U.S.-Canadian border delays. This report addresses the following for U.S. northern border land ports of entry: (1) the extent to which wait times data are reliable and reported trends in wait times, (2) any actions CBP has taken to reduce wait times and any challenges that remain, and (3) the extent to which CBP and FAST participants experience the benefits of the FAST program. GAO analyzed CBP information and data on staffing, infrastructure, wait times, training, and the FAST program from 2003 through 2009 to analyze operations. GAO visited six northern border land ports, which were primarily selected based on commercial traffic volume. GAO interviewed importers, trade organizations, and border stakeholders. The results are not generalizable, but provide insights.