It seemed like a typical congressional meeting for the Republic of Texas. Senators and the president gathered in the center of a Bryan, Texas, meeting hall, surrounded by public onlookers, to debate issues of the national currency, develop international relations and celebrate the birthday of one of their oldest members. But this wasn't 1836, and this would be no ordinary legislative conference. Minutes into the meeting a man among the onlookers stood and moved to open the hall door, letting in an armed and armored force of the Bryan Police Department, the Brazos County Sheriff's Office, the Kerr County Sheriff's...