This is either a Learjet 35 or 36. Though it is a great picture, Marvin, I can't see the number of Sump drains to determine which model it is. For argument sake, you could call it a LJ-35 so it is collected in the Learjet set of pictures.

Two underwing hardpoints. If the trailing edge flaps are extended beyond 26 degrees, then the spoilerons are active for enhanced lateral control...

Still a great shape for an airplane, I love tip tanks! Great shot.