The structures (bends) in twin-jet radio galaxies are sensitive to the thermal and dynamical pressures exerted by the IGM regardless of X-ray detection limits. The bending and distortion of radio tails in rich clusters is likely due to winds in the cluster gas, some of which may be initiated by cluster-cluster mergers. Some sources are found away from the centers of rich clusters where no X-rays are seen. These sources can be used to probe densities below the X-ray sensitivity limit. Both types of observations are surface brightness limited. An enhanced VLA will extend our ability to trace the distortions and the outlying sources in clusters and thus give a more complete picture of the IGM. The increased bandwidth, lower-noise receivers and the E configuration are important to such studies.