Children who survived Oklahoma's deadly tornado sing at a memorial service commemorating victims on Sunday.<br/> <br />Twenty-four people were killed and more than 370 others were injured as the wind tunnel ripped through the suburb of Moore on May 20th.<br/> <br />A first grade teacher recounts the harrowing moments before the twister hit her school.<br/> <br />(SOUNDBITE) (English) FIRST GRADE TEACHER WAYNEL MAYES SAYING:<br/> <br />"I turned around and looked at my room and I didn't know quite what to do but I knew that I had to do something more than I had ever practiced before. I told the students I needed their help to move the desks to the wall. And the children asked why and I said we're going to play a game."<br/> <br />Around 13,000 homes were also destroyed.<br/> <br />The tornado was the worst to hit the United States in two years.
