Study of the Decays $B^0 \to K^+K^-K^0_S$ and $B^+ \to K^+K^-K^+$

We study the decays $B^0 \to K^+K^-K^0_S$ and $B^+ \to K^+K^- K^+$ using a sample of 459 million $\Upsilon(4S) \to B\bar{B}$ events collected with the {\sl B{\scriptsize A}B{\scriptsize AR}} detector at the PEP-II $B$ Factory. We use a Dalitz plot analysis to measure the magnitudes and phases of intermediate resonant and nonresonant amplitudes, and to measure $CP$-violating parameters.