Our group is extending the methods of modern atomic physics to the more complex system of diatomic molecules. Though the vibrational and rotational degrees of freedom of molecules make them more difficult to control, they also provide some new features that are of broad interest to “atomic physics”-type experiments. I will discuss two ongoing experiments of this type. In one, we are applying the technique of laser cooling to diatomics. I will describe recent experiments where we demonstrated 1-D cooling and longitudinal slowing of a molecular beam of SrF. In a second experiment, we are using molecules to amplify the effect of the electroweak interaction by a factor of ~1011 relative to the case in atoms, by exploiting the close spacing between opposite-parity rotational levels in molecules. I will describe the concepts of this experiment, and recent results showing detailed control over the states of interest.