Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
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A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Facial landmark (example: portrait of an adult dog). Head length (AB, fixed, 600 pixels), face width (CD), forehead length (AO), eye width (EF, as the average calculated from the right, E1F1 and left E2F2 eye width), nose length (OH), nose width (IJ), mouth width (KL). Photo: Thinkstock/Getty Images (modified).
