This image is of a protest in Chicago during the great depression, and by the signs of the protesters you can tell they are protesting for jobs or money whilst unemployment, in the form of unemployment insurance. This image shows that during the great depression there was a significant loss of jobs, meaning that a large portion of the average population were unemployed simply due to the small amount of jobs available and not due to being unqualified.
This image shows a protest in New York city in April 2009, the signs in this image suggest that these people were protesting for jobs for the unemployed. By comparing these two images I can see that unemployment was a massive problem during both the great depression and the more recent recession. This would have led to a range of other problems, as if people can't work they can't pay bills and thus may find themselves homeless, they also may not have been able to buy necessities, such as food and clothing which would increase the number of homeless people. This would then make it hard for these people to obtain a job when there was more available due to being homeless.