  Imaging Atmospheric Cherenkov Telescopes have long been viewed as potential
light collectors to be used for long baseline optical intensity interferometry
observations. Intensity interferometry, as implemented with Cherenkov
telescopes, is well suited for studying the spatial structure of stars of O/B/A
stellar types at short optical wavelengths. Such observations complement those
with the current generation of optical amplitude interferometers, which are
typically restricted to longer wavelengths. Dedicated intensity interferometry
instrumentation has been developed for the VERITAS observatory with engineering
tests and observations occurring since October 2018. Here, the first results
using two of the VERITAS telescopes are reported. The system has already been
extended to the two additional telescopes, enabling SII observations with all
four VERITAS telescopes.
