It’s been nine years this weekend since two passenger jets were hijacked and flown into the World Trade Center towers. Those attacks changed this country profoundly, and they continue to have a direct and dramatic effect on the people who worked on site in the aftermath. When Brooklyn firefighter Steve Mormino arrived in lower Manhattan just after midnight on 9/11, he expected devastation. But what struck him most was the silence. For the next four months, Steve worked constantly at Ground Zero. Years later he found out that his lungs had been permanently damaged from the particles in the air. Also, contributor Krista Bremer.