Who's running America? These two guys, for one

Charlie Engle and Marshall Ulrich are on target to leave San Francisco on Aug. 9 and sprint to New York in 45 days. That's 3,200 miles. An average of about 70 miles a day. Or about five marathons every two days.
Yeah, that would be some kind of a world record.
A quick bio on the quirky pair:
Engle, 44, has done more than 100 triathlons, 40 marathons and 20 ultra marathons, plus many adventure races around the world for the last 30 years. Last year, he did a 4,500 mile run across the Sahara desert in Africa (it took 111 days in a row), which was documented in a Matt Damon-narrated flick called "Running the Sahara," which comes out later this year.
Ulrich, 55, is the only person in the world to finish the Triple Crown of Extreme Sports: world class ultra runner, record setting adventure racer, and Seven Summits mountaineer. He has done 116 ultra marathons and 12 expedition races, including all nine Eco Challenges.
"Our dream is for Running America to introduce the real America to people around the world - from the small towns to the big cities; from the sea shores, to the mountains, to the plains - we want the world to see the quality of the people of America," said Engle. "We want Run America to be a catalyst for the revitalization of America."
As the two do their run, the documentary production company NEHST Studios is casting five people per mile to run with them. Find out more information on how to sign up at the website.
The run will take place close to the 100th anniversary of Edward Payson Weston's trans-America expedition. At 71, the long-distance walking pioneer did about a 4,000 mile trek from New York to San Francisco.
For what it's worth, Nick Baldock did this run back in 1999 to raise money. He did the 2,851 miles from San Francisco to Central Park in N.Y. on a run he called Running Across America, but that went from May to September. In 1980, Frank Giannino completed a similar journey in 47 days, which Engle and Ulrich are trying to beat.