Here is a link to a trade agreement between Canada and Tanzania.

I cant seem to post hyperlinks here, just copy and paste in your browser

http://www.international.gc.ca/trade-agreemen...x?lang=eng

It is about a year old but it probably is part of the reason for Bill's visit. This is very similar to Bills visit to Ukraine. These are countries that Canada is partnering with.

http://www.international.gc.ca/trade-agreemen...x?lang=eng