For three days in 2005, flooding from Hurricane Katrina cut off the only road to Port Fourchon. Officials had to decide: did the risk of future flooding justify the cost of raising the roadway out of the Gulf's rising waters?
Curiosity is a cruel master, says Dave Bertelsen. Over the past 25 years, he has hiked over 12,000 miles through a desert canyon, just to see what was blooming. He found a few surprises along the way.