There is only 49 travel agents in the US
There are a total of 89 federal judicial districts in the 50 states, or 94 if you count the 5 additional districts in US territories.
About 800,000.
The Federal Law Enforcement Training Center is the base for training federal officers and law enforcement agents at every level. It provides the standard training for all police and agents across the US.
There are a total of 208 federal courthouses in the United States of America. These are broken down in Article I, Article II, and Article III Federal Courts.
There are way too many and some that are totally useless or dupicate another agency
Any sworn law enforcement officer who is employed by a federal agency or entity of some type who is sworn to uphold and defend the laws of the United States. (e.g.- FBI Agents - BATF Agents - ICE agents - Secret Service Agents - US Marshalls - US Park Police Officers (not to be confused with US Forest or Park Rangers who may, or may not, be sworn law enforcement) - White House Police Officers - etc - etc - etc). In short; any individual with the power of arrest who is employed by the US. The power of their 'jurisdiction" is anywhere in the United States or US territories.
Not enough.
100,000
According to the Bureau of Labor and Statistics in 2010 there were 411,500 registered insurance sales agents in the US with a projected growth of 22%.
20%
No way to answer your question. In the US, there is no requirement under Federal law to register firearms, so no records of how many guns total, It is estimated that at least 25% of US households have at least one firearm.