Photo by Tudor Van Hampton for ENR Ron DeFeo and Guy Ramsey (from left to right) hand a $10,000 check to Brandon Pelletier and Madeline Schildwachter of the Semper Fi Fund. Related Links: ENR's Full CONEXPO Coverage Learn More About the Semper Fi Fund Brandon Pelletier, a turret gunner who served in the Iraq war, recalled his own recovery in 2008, not long after an improvised explosive device discharged under his Humvee, crushing his right arm and leaving it paralyzed."I was in some dark places in my rehab," said Pelletier, 26, who also suffers from a traumatic brain injury that
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.