martha rivera alonis had one thought when she heard gunshots outside of her classroom in mexico. her students. so in a calm voice she coaxed 15, 5 and 6-year-olds to the floor and led them in song assuring them that nothing is going to happen. you have to see this. [ speaking foreign language ] ♪ >>> and yesterday, she was honored for outstanding civic courage by the governor of nuevo lee own and she says that the kids are the brave ones and the gunshots by the way, five people were gunned down at a taxi stand one block away. >>> despite our attempts to be more green, we are seeing record-breaking emissions of greenhouse gases. we breakdown why that is, and what it means to us next. male ] in 2011, at&t is at work, building up our wireless network all across america. we're adding new cell sites... increasing network capacity, and investing billions of dollars to improve your wireless network experience. from a single phone call to the most advanced data download, we're covering more people in more places than ever before in an effort to give you the best network possible. at&t. r