This video will guide you to unlocking the challenge 'Lost and Found' in chapter 13 of Hitman: Absolution, Fight Night. You must infiltrate the patriot's hangar (undetected, if possible), sneak to the back right corner of the map and locate the key card that opens the door to the next stage.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!