Officials: Vets' float crossed track after signals - Article Photos 18/20

Midland Mayor Wes Perry speaks during a candlelight vigil held at Centennial Plaza in Midland, Texas on Saturday, Nov. 17, 2012 in honor of the people involved in an accident where a Union Pacific train struck a float carrying military veterans on Thursday, Nov. 15, 2012. Four veterans were killed, including one from the San Antonio area. (AP Photo/San Antonio Express-News, Edward A. Ornelas)