Do you trust what you saw: 100 years of magical dismemberment

Magicians around the world are celebrating the 100th anniversary of the first time a woman was sawn in half. The illusion was first shown to the public by PT Selbit in Finsbury Park in London in 1921. 100 years on members of The Magic Circle will be meeting online to celebrate and show off their versions of this classic trick. Bernard Reid is New Zealand's historian on magic.