From Mikey Wier:

After visiting Mongolia in 2006, I vowed to return and some day float a remote river we fished and explored. This is the story of that trip. In 2008, a small group of American anglers, along with the help of a group of skilled Mongolians, became the first to float and fish this remote river in the northern steps of Mongolia. We covered 140 miles and had some great fishing. Look for a full length DVD to be released later this year from BurlProductions.

Resources:

Mongofly trips

Jeff Currier's Global Fly Fishing

Brent Dawson's Warpath taimen flies