Transcript by www.newsy.com BY MEGAN NOE You're watching multisource world news analysis from Newsy. When Martha Rivera Alanis became a kindergarten teacher, you can bet this wasn't in the job description. As gunfire rang out outside the Mexican school last week, Rivera calmed her students with a song from Barney. The YouTube video has gone viral since friends posted it to YouTube, fueling discussion by the BBC and others about the drug war's traumatizing effects on regular citizens. "'The truth is, I was a little bit scared, but my children helped me through it.' She may be today's heroine, but for many in Mexico, the episode is a painful reminder that the violence from organized crime has become a reality that they can't but learn to live with." The shootout in Monterrey killed five, adding to the nearly 40000 killed in Mexican drug violence since 2006. Rivera serves on a security committee for teachers-- a team that is becoming all too necessary, says Al Jazeera. "In those towns and cities, an increasing number of children and teens are living through gun battles among rival gangs who are killing each other over control for key drug trafficking routes. Some children are being taught what to do if they find themselves in the crossfire. This teacher tells her students that when shootings start, they should watch out for stray bullets." A Times Record News writer says teachers shouldn't have to be drug warriors...and she offers a solution. "Before Congress spends another ...