Zoom Recording Passcode: &spHtvO9

In spite of ever more detailed studies over the last five decades across the electromagnetic spectrum of relativistic jets in active galaxies, we have not yet determined their composition (leptonic or hadronic), and nor have the observations provided definitive verification of the theories and GRMHD simulations of their launching and collimation processes.  Compelling proofs of these most basic elements of relativistic jets in AGN have thus far eluded us. I will describe three areas linking radio observations with Fermi gamma-ray observations, nanogravity observations, and high-energy neutrino observations,  that are  providing, for the first time, detailed quantitative measurements that cast new light on relativistic jets and present new opportunities for testing both theory and simulations.