Conclusions

• Buoyant bubbles transport energy and magnetic fields into clusters and can entrain cool gas.

• Shell pressures can be used to determine the total energies of the radio sources.

• A rough comparison of the average energy output of radio sources and the luminosity of cooling gas shows that the radio sources can supply enough energy to offset the cooling in cooling flows, at least in some cases.

• Distorted (WAT) FR I radio sources can be used as tracers of high-z X-ray-emitting clusters