I thought it might interesting to go through the Government of Canada Travel Expense reports and see WHOM and how often do various Canadian Government officials deal with the US Treasury Department and Internal Revenue Service.
How are some of the more interesting travel logs:
Terrance McCauley Assistant Commissioner Compliance CRA visit to IRS National Office Washington, DC May 7th 2012
http://www.cra-arc.gc.ca/gncy/xpnss/mcauley2/2012/q2/3265t1-eng.html