A California airport is considering a major policy shift that would allow non-ticketed visitors to undergo TSA screening and enter secure areas and greet arriving passengers or say goodbye to departing loved ones at the gate.Fresno Yosemite International Airport's potential change would bring back the emotional send-offs and gate-side reunions that were common before the Sept. 11, 2001, terrorist attacks led to heightened airport security measures.Under the post-9/11 policies, access beyond airport security checkpoints was generally limited to ticketed travelers, although airlines could issue...