aa elite enjoy Priority Security Expedited Checkin

american airlines PriorityAAccess is the new name for a group of privileges and services at the airport available exclusively for AAdvantage elite status members and a select group of American's other top travellers. The benefits include the option to check in at First or Business Class counters, the use of exclusive security screening lanes where available, and designated PriorityAAccess boarding lanes at the gate.

Expedited Check-in and fast track Security Screening.
PriorityAAccess passengers will appreciate the exclusive security screening lanes (mostly available in airports within the United States) and dedicated check-in areas at ticket counters.

Available at American Airlines gates system wide, PriorityAAccess lanes offer a fast track for boarding.
Customers with PriorityAAccess privileges can be among the first to board or can enjoy the convenience of boarding anytime via a dedicated boarding lane. Even if you arrive at the gate after general boarding has begun, you can bypass any lines via this special PriorityAAccess lane.
Customers traveling in First or Business Class, AAdvantage Executive Platinum® members, AAdvantage Platinum® members, and AAdvantage Gold® members, AAirpass® travelers, customers traveling on a full-fare Economy Class ticket booked in Y, and oneworld® Emerald, Sapphire, and Ruby members.