Yes. They would not be very effective against criminals with guns with just a badge.
(in the US) Law Enforcement officers have always been armed.
It has a police force- the US Postal Inspection Service. They carry guns and require training and practice.
No
Anywhere in the US
(in the US) Yes, all law enforcement officers are armed. In other nations; Some are armed and some are not (e.g.: the United Kingdom), in still others the police routinely carry even heavier weapons than what is the norm in the US.
Unknown. No published data.
Some do, some don't.
No. About half the households in US have guns. Not every gun owner in the US carries a gun. The exact stats are uncertain, but simple logic would demonstrate that it would be less than 50% of Americans that carry guns.
The lights that com out of guns are only used by police officers and the US army.
In the US Members of police bomb squads are police officers, the same as any patrol officer. As such, their job may entail the use and carrying of firearms. The bomb squad in the UK are members of the British Army, they are trained to use weapons in a combat situation but do not carry weapons on the streets of the UK.
Most U.S. police officers carry semi-automatic sidearms in 9mm, .40 caliber, or .45 ACP. Glock has about 65% of the U.S. law enforcement market. Other major manufacturers are Smith and Wesson, Sig Sauer, and Ruger.
Yes. It may require a license or permit, but yes.