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.
(A) Example of a poor quality image (grade 1). (B) Example of a moderately bad quality image (grade 2). (C) Example of a moderate quality image (grade 3). (D) Example of a moderately good quality image (grade 4). (E) Example of a good quality image (grade 5).
