9/11: 20 years on injuries from the World Trade Centre collapse still being reported

Two decades after the twin towers' collapse, people are still coming forward to report illnesses that might be related to the attacks. Today there are more than 111,000 people enrolled in the World Trade Center Health Programme, which gives free medical care to people with health problems potentially linked to the dust. Comments from Dr. Michael Crane, director of World Trade Center Health Programme and Former Governor of New York, George Pataki.