Airbus A321 (N125AA)

An American Airlines Airbus A321 Flies By While Approaching Dulles Int Airport Runway 1C, You Can Know What Each A320 Family Member Looks Like If/Or You Are Spotting, The A318 Is The Shortest, The A319 Is The Second Shortest, (But Normally For Most Airports And Airlines The A319 Is The Shortest You Will Ever Normally See) The A320 Is The Third Shortest, And The A321 Is The Largest, At Cruising Altitude The A321, If You Are Not Tracking And Are Spotting "Blind" (You Don't Have Radar To Track And Know What's Coming), Then It Can Often Be Confused As A Boeing B757-200 Due To The Big Stretch, (The A321 Often Confuses Me As A B757-200) But Up Close, At This Altitude (Or Lower) The Difference Between A A321 And A B757-200 Is Very Obvious