No.
Most, but not all, are imported from China. If you check the catalog listing for Field and Stream safes at Dick's Sporting Goods, it shows the country of origin at the bottom of the listing.
China
First Alert sells custom made fireproof safes. Sentrysafeshop also sells custom made fireproof safes. You can also check with your local fire department on ideas of other places that sells fireproof safes.
You can buy used gun safes in the US in many different places. Amazon and eBay are popular places that people often buy these type of cases at. Gun stores also sell used gun safes.
Gun safes are typically constructed from steel plating with fire-insulating material in them. The steel walls are usually quite thick, as much as an inch thick in some safes.
If you're in the UK, retailers like Argos sell safes online. If you're in the US, Best Buy offers a variety of options for electronic safes to choose from.
Usually most safes/gun safes have a reset button on the inside of the safe.
Yes, we should keep our guns in safes because it is safe from the reach of children and thieves also. This is safe place for us. Now there are a lot of different variety safes available in market.
Mesa Safes manufactures the Excalibur line of safes.
Boeing 747-400
No