The world marks the 20th anniversary of the 9/11 attacks in two days. Four US commercial aircraft were hijacked on September 11th, 2001 which was orchestrated by Al Qaeda leader Osama bin Laden. <br /><br />The planes crashed into two towers of the World Trade Center in New York City, the Pentagon in Washington DC, and a field in Pennsylvania killing nearly 3,000 people. <br /><br />Tristan Nodalo speaks to two survivors who share how the tragedy changed their lives. www.cnn.ph
