Presentation #126.02 in the session Radio Astronomy in New Mexico.
The Fermi gamma-ray satellite has been in operation since 2008 and revolutionized our knowledge of this part of the electromagnetic spectrum from 30 MeV to about 300 GeV. A constant throughout this time has been the large fraction (~33%) of detected gamma-ray point sources that lack a plausible multi-wavelength counterpart. Radio observations have been key in making associations with AGN and pulsars, including shedding light on the population of unassociated gamma-ray sources. I will provide a summary on the state of unassociated gamma-ray sources and efforts underway with existing instruments, including the Very Large Array, to better understand their nature, with the goal to unlock new source populations. I will showcase how such observations have led to discoveries of new gamma-ray loud AGN, exotic pulsars, and other puzzles. I will also discuss how new instruments, including the next generation Very Large Array, could further our understanding of physics related to the production of emission at and above MeV energies in cosmic sources.