Context: On 26 July 2012, to coincide with the official start of the London 2012 Olympics and the issuing of a series of souvenir front covers, The Times added the suffix "of London" to its masthead.

Question: What major event took place in London in 2012?
Answer: London 2012 Olympics

Question: What kind of front cover did The Times issue on 26 July 2012?
Answer: souvenir

Question: In 2012, The Times added what suffix to its masthead?
Answer: of London