You can carry a handgun openly without a permit, except in your vehicle. To carry a gun in your vehicle, or to carry a gun concealed, you must have a NH permit or a permit that is recognized by the state of NH. For more information, see opencary.org, or handgunlaw.us
If you have a handgun carry permit, definitely. The handgun carry permit covers "any handgun that you legally own or posses."
A SIG P228 handgun.
You can not carry an unconcealed handgun in Texas with or without a license.
No
Depends on where you are. They are illegal in New Jersey.
All countries - once you have legal permission, allow you to carry a handgun.
Keeping a handgun in your car is legal, it is considered a home extension, and in public, I believe you have to have a concealed carry permit. (New Orleans follows the same rules as the rest of Louisiana)
No
It depends on what you mean exactly. You can transport an unloaded handgun in your vehicle while you travel as long as the handgun isn't accessible to you. However, if you have a handgun carry permit, you can carry the gun on your person in some states. That said, you can carry a handgun on your person inside your car in some states without a permit. Check out handgunlaw.us for more information about each individual state's laws.
You can legally transport it unloaded and inaccessible, but to have it loaded and accessible, you must have a NY handgun carry permit.
No, Washington DC does not allow concealed handgun carry, nor do they recognize permits from any other state.
Arizona is an open carry state. If you can legally own a handgun, you can carry it openly without a permit. If you want to carry a concealed handgun, you need a permit.