The U.S. military veteran who fatally shot five Dallas police officers was plotting a larger assault, possibly using explosives, and he taunted police and wrote on a wall in his own blood before being killed, authorities said on Sunday. Instead, Micah X. Johnson improvised and used his military training to gun down officers during a demonstration on Thursday evening, Dallas Police Chief David Brown told CNN. It was the deadliest day for U.S. law enforcement since the Sept. 11, 2001, attacks.
