Inside a darkened classroom in Mokena, Ill., a student lowers a face shield and braces a MIG torch above a small podium. The class hears the sounds of electric arcs hissing, while they size up the incoming weld as part of a contest to see who has the best “golden arm.” Photo: Tudor Van Hampton / ENR A pipefitter apprentice at Local 597 performs MIG welding in the virtual world. In a few seconds, the exercise is over, yet no sparks, heat or fumes—no real welding—actually happened here. It was all performed in a simulated world, a Guitar Hero for
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.