MEXICO CITY ? Police in the Mexican capital have kicked off a campaign to exchange guns for computers and other gifts in an attempt to reduce firearm deaths. On the first day of the program in Tepito, a neighborhood known for drug dealing and street markets rife with contraband, officers collected 29 guns Tuesday and gave out several desktop computers along with packets of food and cash. "Imagine how Mexico City would be if there were no guns," Mexico City Public Safety Secretary Joel Ortega said. "This is a barrio known for boxing champions, and now it has turned into...