http://www.hardscrabblefarm.com/vn/passwords.html
[i]''Two fireteams approach each other. [''YOUR SENTRY OR SPOTTER<bBockquote>Halt.</i]blockquote>
[color=green]YOUR SENTRY OR SPOTTER[/color]Halt''They stop. ''
[i]They stop. [YOUR SPOTTER<blockquote>Who is there?</i]blockquote>
[color=green]YOUR SPOTTER[THEIR FIRETEAM LEADER<blockquote>Squad Alfa.</color]Who is there?blockquote>
[color=green]THEIR FIRETEAM LEADER[/color]Squad Alfa''Keeping hidden, bring them to 10 feet away and stop them.''
[i]Keeping hidden, bring them to 10 feet away YOUR SPOTTER<blockquote>Advance and stop thembe recognized.[ ... Stop. </i]blockquote>
[color=green]YOUR SPOTTER[/color]''(Low clear voice.)''Advance and be recognized<blockquote>Top. ... Stop. </blockquote>
[color=green]YOUR SPOTTER [/color][i]THEIR FIRETEAM LEADER ''(Low clear voice.)[/i]''Top<blockquote>Hat.</blockquote>
[color=green]THEIR FIRETEAM LEADER[/color][i](Low clear voice.)[/i]Hat. [i]''Allow them to pass, they are friendly.[/i]''
Challenge Response combination was: Top Hat.