  We discuss a new VLBA program to investigate structural and polarization
changes in the brightest AGN jets in the northern sky. Our study represents a
significant improvement over previous surveys in terms of image fidelity, size,
and completeness, and will serve to characterize the kinematics of AGN jets and
determine how these are related to other source properties. We discuss several
preliminary results from our program, including the detection of parsec-scale
circularly polarized jet emission, enhanced magnetic field ordering at the
sites of apparent bends, and intrinsic differences in the jets of strong- and
weak-lined AGN.
