The collapse of Lehman Brothers - in September 2008 - was the biggest bankruptcy in US corporate history. The bank had incurred losses of billions of dollars in the US mortgage market.
The resulting shockwave that week was far reaching - with share prices plunging around the world, and other financial companies coming perilously close to the same fate as Lehmans'.
Here - with the help of BBC Radio reports from that week - see how events unfolded.
http://news.bbc.co.uk/1/hi/business/8234734.stm25 billion from Barclay's could've saved them on the Sunday but there was a technical problem. Paulson needed confirmation of that that commitment by midnight on Sunday 14th - before Japan opened. Darling explained to him that under UK law that would be illegal - would've needed a shareholder vote that couldn't be done until the Tuesday.