Fermi-LAT gamma-ray and MWACS fluxes for 3LAC blazars. In the main panel (right), we show the 4 yr gamma-ray energy flux at E> 100 MeV vs. MWACS radio flux density at 180 MHz; the dashed line is the best-fit linear regression. In the smaller left panel, we show the gamma-ray flux distribution for blazars that are not detected in MWACS; gamma-ray flux increases along the y-axis, and simple counts increase right-to-left along the x-axis.