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.
Shape (horizontal): 1 = absent, 4 = present on tip, inner and outer vane. Extent (vertical): 1 = absent, 5 = covering at least one vane entirely.
