it was the best feeliever. 'cause it made me realize, if i did a marathon, if i can do this, i can do anything. >> in fact, since that first marathon, the sergeant has completed many marathons and raced 3,000 miles across america. achilles also runs programs for kids with disabilities. you can find out about training, as well as racing opportunities, by checking out the link on our website. whether a soldier or a kid, the goal is the same. it doesn't matter if you run, walk, or roll towards the finish line. what matters is that you're able to show that you've got as much game as anyone. >> it's been called the spice of life. but adding too much to our food may be hazardous to our health. i'll have that story next. >> it's a building block of life itself, but too much of it can be very bad for your health. now there's a nationwide effort to protect us from something we love to add to our food. nicole has the story. >> salt is everywhere. it's about 3% of the ocean. our bodies need it to survive. and we love its