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.
The leftmost isolated set of lines shows latencies from Phase I, third step, the middle set shows latencies from Phase II, and the rightmost set shows latencies from Phase III. Roman numerals identify phase numbers. See text for details.
