I love this photo of this Citation jet sharking overhead on its way to land at Austin Bergstrom International Airport. I love that the livery of the plane wraps around the underside of the fuselage and looks almost like a shark swimming overhead.
I believe this to be a Citation II jet.
The Citation II jet is essentially a stretched out Citation I, with bigger engines. The Citation II will seat up to 10 passengers and since it has more powerful engines than the the Citation I, it can fly farther, faster and with more luggage.