Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
On the top, the graphs are represented without any ordering, on the bottom nodes are divided according to their ranks. The red links are the backward ones, those contributing to agony, and the black links are the forward ones.
