Institution(s): 1. University of Waterloo
The Event Horizon Telescope (EHT), a global mm-VLBI experiment, has already resolved two AGN on sub-horizon scales. This permits transformative studies of both accretion and jet formation. However, it also provides an unprecedented opportunity to study gravity in the strong-field regime. I will discuss the some of the ways that the EHT has begun to do this, and how the rapid development of the EHT capabilities over the next two years will result in sub-percent precision tests of general relativity.