  To investigate the origins of wide-angle tailed radio sources (WATs), we have
compiled a sample of these systems in Abell clusters for which X-ray data
exist. Contrary to conventional wisdom, the WATs are found to be significantly
displaced from the X-ray centroids of their host clusters. The bends in the
WATs' radio jets are found to be oriented preferentially such that they point
directly away from or toward the cluster centre, with more of the former than
the latter. If this morphology is attributed to ram pressure, then the WATs are
on primarily radial orbits, with more approaching the X-ray centroid than
receding. There is also some evidence that the in-coming WATs are on average
further from the X-ray centroid than the out-going ones. All of these
observations strongly support a scenario in which WATs are created in cluster
mergers.
