Robots on a recycling rampage

More than 150 robots, in a wide variety of sizes, shapes and capabilities, will battle it out on May 6 and 7 to see which can collect the most soda cans and simulated bales of trash and return then to a recycling facility all in under a minute. The matchups are the culmination of 2.007, a required class for sophomores in mechanical engineering, and it's an MIT tradition that goes back more than two decades.