SAO PAULO, Brazil - Thousands of fans surged through security barriers Saturday at an autograph session for a wildly popular Mexican band, leaving three people crushed to death and 38 injured, mostly teenagers. The incident came only weeks after police in New Jersey and Texas also struggled to contain unexpectedly large turnouts of fans for the RBD band, which stars in the television show "Rebelde." The show has made RBD one of the most popular groups in Latin America and among Spanish-speaking communities in the United States. Between 10,000 and 15,000 fans gathered outside a shopping center in Sao Paulo...