BROWNSVILLE, Texas (AP) -- A cactus-dotted stretch of land that lay forgotten for more than a century is where the National Park Service decided to put its first site dedicated to the U.S.-Mexican War. Appropriately, the 3,400-acre Palo Alto Battlefield is where U.S. and Mexican soldiers began a fight that led to Mexico losing half its territory and the United States gaining claim to the Southwest. However, the visitor's center, which officially opens Saturday, will feature displays reflecting both U.S. and Mexican perspectives on the war -- in English and Spanish -- in hopes of attracting visitors from both sides...