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.
In practice, our implementation only creates subtrees for sets of reactions significantly larger than those shown in Cloud A's subtrees, for efficiency reasons. As a result, most clouds are like Cloud B and have no subtrees.
