  The four-component gravitational lens CLASS B1608+656 has been monitored with
the VLA for two seasons in order to search for time delays between the
components. These time delays can be combined with mass models of the lens
system to yield a measurement of H_0. The component light curves show
significantly different behavior in the two observing seasons. In the first
season the light curves have maximum variations of ~5%, while in the second
season the components experienced a nearly monotonic ~40% decrease in flux. We
present the time delays derived from a joint analysis of the light curves from
the two seasons.
