Modify+Minimal+Spanning+Tree+(Brady+Earl)

I think adding one more difficulty would be awesome. EXTREME difficulty! It would be a map of all the major cities in the world and their connections. But not connections like mail routes. It could be Internet connections throughout the world, over land the connections would be cable and over seas satellites that orbit the Earth.

Vicki: Making it harder just makes it more tedious, without increased learning. What I think needs to happen is more structure in guiding the development of the algorithm: 1. We want to develop a method which (a) always works (b) is faster than trial and error (c) does not depend on a wizard telling us whether we are "done" yet 2. Discuss strategies 3. Will it work with negative edge weights.