A US soldier accused of plotting an attack on a military base after fleeing his post as a Muslim conscientious objector went on trial Tuesday wearing a surgical mask and manacled to the floor. Courtroom security agents behind him wore protective goggles, an apparent reaction to an incident in which the soldier, Naser Jason Abdo, who claims to be HIV positive, bit his lip and spat blood at law enforcement officers. Prosecutors called the first of 43 witnesses to the stand in a bid to show that Abdo, who fled his post in Kentucky, was gathering bomb-making materials and weapons...