Nobel chemistry prize for DNA scientists Lindahl, Modrich and Sancar

This year's Nobel prize for chemistry has been awarded to three scientists, whose work could be vital to the search for new cancer treatments.

Tomas Lindahl, who worked for many years at the Francis Crick Institute in London, along with the Americans Paul Modrich and Aziz Sancar, helped discover how DNA in the body repairs itself.

Pallab Ghosh reports.