"Good that the man was not found there(in a sense that no one was harmed)."

You assume that there _was_ a man and that he had a firearm. Both are likely to be false, especially the latter.

"There's some reason you have police, military, para-military and federal agencies so that citizens don't have to handle this aspect of security."

No, the police cannot protect the citizen from crime but they can report and investigate crime. Occasionally the police intercept a crime-in-progress. But their intervention is optional: officers may pass by a crime in progress during shift change; otherwise they'll be writing an offense report for hours. Old saying: "When seconds count, the police are only minutes away."

Also courts have consistently held that police are not required to protect someone. So people in the USA are in general allowed to protect themselves.

http://www.nytimes.com/2005/06/28/politics/28scotus.html

"is it as easy and as simple to get a gun in USA as it's projected in films or in the media? "

It was once much easier: IIRC in the "Death Wish" movie series, Charles Bronson's character obtains his firearms via mail-order. Today it's a more involved process:

TO PURCHASE A FIREARM FROM AN FFL DEALER:

The buyer must complete and sign a "4473 form" verifying his fitness to own a firearm (to lie is a crime). The buyer must provide identification information (e.g., driver's license). The dealer phones the federal National Instant Criminal Background Check System (NICS). NICS is given the buyer information plus the fact that the purchase is either a long gun or a handgun (no firearm serial numbers, etc. are given to NICS). NICS does a background check and either allows or disallows the sale. The buyer pays the dealer and is given the firearm. Afterward, in a separate "bound-book", the dealer records the 4473 info along with the firearms' identifying information. The 4473 forms and the bound-book are kept forever and, if the dealer goes out of business, those records are given to the government.

http://www.atf.gov/applications/e4473/

http://www.atf.gov/firearms/faq/atf-f-4473.html

So to form a registry of all purchased firearms in the USA would require linking the NICS information (which legally is mandated to be destroyed after a short period of time) with the 4473 information. Federal gun control laws have driven relentlessly toward that goal (combined NICS + 4473 = firearms registration) all the while saying that a firearms registry is fantasy. But there's more...

TO PURCHASE A FIREARM FROM AN INDIVIDUAL:

The buyer must provide proof to the seller that he may legally purchase a firearm in that state. This varies from state to state but usually consists of the buyer showing a driver's license from that state and then stating that he may legally own a firearm (essentially the questions on the 4473 form must be accounted for). To lie is a crime. No NICS check is performed and no records need be kept.

This latter transaction is often termed the "Gun Show Loophole" although it can occur anywhere (no gun show is required). It is a private firearms transfer between private individuals: not dealer to customer, or customer to dealer. It is termed a "loophole" by anti-gunners because it prevents tracing firearms' with the combined NICS + 4473 information: it would render a firearms registry at least partially incomplete.

So today we are two steps away from full firearms registration:

- eliminate private firearms transfers between private individuals,

- allow the government to collect and keep forever all NICS and 4473 information.

PROBLEMS

- It is unknown whether the (passed) NICS check information is discarded after 24 hours as is mandated by law (a failed NICS check is kept longer for investigation since it indicates a crime may has been committed). One who was thorough would inquire as to the logging and backup systems used by NICS. Worst case: ATF has all NICS check data in a database.

- 4473 form information may be destroyed after 20 years. However the dealer's bound-book must be given to a business' new owner or handed over to the ATF when the business closes. Worst case: ATF has lots of 4473 information in a database.

- There have apparently been instances where the ATF scanned (illegally) dealers' 4473 forms en masse during audits.

- Worst case overall: ATF (illegally) has a combined NICS + 4473 database which is a partial registry of legally-purchased firearms in the USA.