m.j. what m.j. did for moms know their kids need love. and encouragement. they also know milk is a nutrient powerhouse. with 8 grams of natural protein, plus 8 other essential nutrients. it's no surprise 9 out of 10 u.s. olympians grew up drinking milk. >> it is 5:54. >>> go pros are popular among train. scott butman has details. >> reporter: you already know go pro cameras. they're everywhere -- on kids' toys, recording way we get around. now cameras are going from extreme sports to limpic racing. >> because we measure what athletes do, you can go after the ct performance frame by frame. >> they use go pros underwater. >> they're proving strokes on land and under the water. >> all these olympic athletes are putting in hour of work and being able to scrub through >> with angles and angles, go pro is change how people train. >> they're doing sports analysis and helping athletes perform and improve their performance. >> one stroke at a time. >>> it appears methane comes from production. nasa identified more than 200 methane in the four corners region. as much