Now Playing: 07-12-12 Marketplace

Scorching temperatures and droughts around the country have taken their toll on the corn harvest -- and the skyrocketing corn prices could affect nearly every aspect of your life. A new report says that the summer job market for teens is picking up. Meanwhile, companies are cracking down on overtime hours because apparently employees aren't claiming enough of them. The fanfest known as Comic-Con kicks off in San Diego, but it looks like some of Hollywood's biggest studios skipping out this year. New York City is rolling out a pilot program that converts payphones into Wi-Fi hot spots. And Kai Ryssdal talks to liberal pundit James Carville about what matters in this year's presidential election.