Jake Bleiberg, Gene Johnson And Lolita C. Baldor, The Associated Press ALLEN, Texas (AP) - Posts by Mauricio Garcia on a Russian social networking site suggest that he planned for weeks before he opened fire at a suburban Dallas shopping mall last weekend, killing eight people and wounding seven others. Garcia, 33, researched when the mall in Allen was busiest - Saturday afternoons - and posted photos on social media in mid-April of a store near where he ultimately started his attack last Saturday, which ended with police killing him. Among the dead were two elementary school-age sisters, a couple...