Ross McWhirter: The Guinness World Records Co-Founder Killed by the IRA, and the Six-Day Siege That Followed

Ross McWhirter spent his career counting things. He and his identical twin brother Norris built the Guinness Book of Records out of a talent for tracking down the fastest, the tallest, the heaviest and the most, and it made both of them minor celebrities, regulars on the BBC quiz show Record Breakers where kids wrote in with dares for them to settle. Then, in the autumn of 1975, Ross put a price on the heads of the IRA unit bombing London and was shot dead outside his own front door for it....