To obey the law with respect to gun ownership and use, you have to know the law.

Here is a collection of links that will help you.

BATFE FAQ's

2006 Compilation of State Firearms Laws and Ordinances

Transportation Security Adminstration Rules

National Instant Criminal Background Check System (NICS)

Federal Firearms Regulations Reference Guide (2005)

Guide to Interstate Right To Carry Reciprocity and Recognition

We'll have more links coming soon. It takes time to accumulate these things.