The current policy is to protect Presidents while they are running for office, while they are in office, and after they leave office. The are perpetually protected.
Code words of the Secret Service are ambiguous words, many of which are used to refer to U.S. presidents. They are not known to the general public.
Yes, all ex-Presidents receive Secret Service protection.
The people who protect the U.S. President, Vice President and their families are called the Secret Service.
The official name is the United States Secret Service (USSS). It is a federal law enforcement agency under the U.S. Department of Homeland Security.
No - considering the assassination of four Presidents not one US Secret Service agent has been killed on Presidential Protection Detail duty
The Secret Service
London
2006
Its the Law.
US Treasury Dept
http://www.washingtonpost.com/wp-dyn/content/article/2007/06/16/AR2007061601079.html This article has a few, but not a comprehensive list.
Sorry, that would be a 'secret'.