Fig. 2.
Presents an overview of the first visit flow. A * indicates a step exclusive to visit 1, and a ** indicates a step that is modified for future visits.
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.