The US government spent nearly 3.7 million dollars on former presidents in 2012, according to an analysis.
List of US presidents
Here is a look at five of the most prominent US presidents.
Former US Presidents Bill Clinton and George W Bush visited Port-au-Prince and promised Haitians the world had not forgotten them.
Day in Pics: 24th November
Showbiz World - November 24, 2014
Los Angeles Auto Show