Figure 7,,, Long-Distance Trips for Personal Business,,, Mode,Air,POV,All modes Pre 9/11,9.4%,13.4%,13.5% Post 9/11,6.4%,12.2%,12.1% "SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, NHTS 2001 Long Distance Pre-9/11 and Post-9/11 Files.",,,