A look at the air disaster which left all passengers and crew dead - apart from one man, Vishwash Kumar Ramesh. Air India Flight 171 was headed to Britain from Ahmedabad when it exploded just under a minute after take-off. Sat in seat 11a, near the emergency exit, Vishwash walked away from the scene as the sole survivor. This programme charts the aftermath of the crash and examines how it could've happened in the first place