If the London Olympic Games were cancelled at the last minute, it wouldn't just be the spectators who'd be disappointed - insurers covering the international event would face huge compensation bills.
And, unlike the Beijing Olympic Games where insurers mainly worried about the risk of earthquakes, the London Olympics' biggest insurance risks are terrorist attacks and riots - not to mention the weather, according to an expert in Olympic insurance coverage.
'Hosting the Olympics in London will bring different challenges to those posed in China four years ago,' Munich Re underwriting manager Andrew Duxbury said.
'In Beijing, natural catastrophe risks such as earthquakes were on insurers' minds, whereas in London, flash flooding from summer storms could cause temporary disruption.
'However, issues such as terrorism are potentially much more serious.
'I can spend more sleepless nights worrying about London because the terror risk is undoubtedly there.'
He said that given London had been the target of terrorist attacks in the past, many underwriters would probably consider 'London a higher terror risk [than Beijing] and charge risk-adequate premiums'.