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An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

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.

Alternative versions

Alternate versions of web pages should only be used when the main page can’t be made accessible. There are very few instances where they would be necessary. Live dynamic mapping applications are one example.

In a situation where an alternate version is provided, it must provide the same information and provide similar functions.