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October 14, 2012
Felicia Fonseca photo

In this photo taken Oct. 10, 2012, Steve Sullivan stands outside his office in Flagstaff, Ariz. Sullivan oversees a lottery system in which private trips are awarded on the Colorado River through the Grand Canyon. Grand Canyon National Park has collected six years of data on the lottery system since it made the switch from the waiting list in 2006 and doubled the amount of private launch opportunities. Paying a rafting company for a commercial trip leads to a much faster launch for those wanting to snake down hundreds of miles of the river, and joining another private river trip could, too.