Tommy Hernandez, 6, left, presses a button to hear the different horn sounds with his brother, Noey Hernandez, 8, on the Amtrak 40th Anniversary Exhibit Train at Sunset Station on Saturday, Jan. 21. 2012. The exhibit will be open Sunday, Jan. 22, from 10 am to 4 pm. Lisa Krantz/San Antonio Express-News Photo: Lisa Krantz, San Antonio Express-News / @2012 SAN ANTONIO EXPRESS-NEWS
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