They need only to have reasonable SUSPICION in order to detain you on the street.
ANSWER
They may also stop you at checkpoints without reasonable suspicion. An example would be a sobriety checkpoint where everyone is stopped or a random pattern such as every other vehicle, or every 3rd vehicle is stopped.
The technical answer is no, unless the officer has jurisdiction within that city. An example would be a sheriff, they're county Police and If the other city is within the same county they can. Also state Police have jurisdiction within the entire state.
If you are out in public then yes, but if you are at your house than no.
yes
Because if the police are allowed to do whatever they want, then they would probably cause trouble for many innocent people as well.
A stop and frisk is when a police officer stops you in the street and frisks you; much like they do in the Airport. It consists of physically checking your body for weapons or anything else that is illegal.
Waldo Street Police Station was created in 1918.
Russell Street Police Headquarters was created in 1943.
Walsh Street police shootings happened on 1988-10-12.
Old Hill Street Police Station was created in 1934.
Brown v. Texas
Uniformed street officers do not wear cute clothes with their badges. However, detectives are allowed to wear professional but cute clothes with their badges.
The police station is down the street.
They can only confiscate the gun if you were breaking some law, like carrying it in the vehicle loaded, if not allowed in your state. They are allowed to secure the weapon until after the traffic stop is over if no gun laws were broken, but must return in after the traffic stop.
The police should obey the law just like everyone else.