  An overview of the observation of CP violation in the neutral B system, and
the measurements of the CP violating asymmetry sin(2beta) with B to charmonium
K^0_{S,L} events, performed by the BaBar and Belle experiments at the SLAC and
KEK B factories is given. In addition, the measurements of sin(2beta) with
several other modes are described, including B to phi KS, which, as the leading
contribution is from a loop diagram, could be sensitive to physics beyond the
Standard Model.
