TSA.gov is the transportation agency run by the Government of the United States of America. The Asheville Airport abides by all their laws, and recommends all travelers visit their site for information on nationwide standards and customs. Any questions we can't answer can probably be found on their site. We will make numerous references to TSA.gov because of its authority and standard.
From TSA.gov itself:
We are your neighbors, friends and relatives. We are 50,000 security officers, inspectors, directors, air marshals and managers who protect the nation's transportation systems so you and your family can travel safely. We look for bombs at checkpoints in airports, we inspect rail cars, we patrol subways with our law enforcement partners, and we work to make all modes of transportation safe.
Visit TSA.gov here.