On September 11, 2001 New York's World Trade Centre towers were brought crashing down, forever changing the course of history.   Almost 3,000 lives were lost that day – as well as America’s innocence. With the country’s vulnerability to terrorism so cruelly exposed, the US instigated two foreign invasions whose consequences are still being felt today.   On this week's Beyond the Headlines, host Leila Gharagozlou examines the legacy of 9/11 in America and Afghanistan.