<human>: I've been hearing a lot about the 'financial crisis'. What happened?
<bot>: The financial crisis was caused by a combination of factors, including the collapse of the housing market, the recession, and the failure of some banks to manage their risk properly. Banks were not lending money to businesses and individuals because they were worried that those borrowers might default on their loans. This led to a decrease in economic activity, which in turn caused more people to lose their jobs.