  Starting in 2008, NASA has provided the exoplanet community an observational
program aimed at obtaining the highest resolution imaging available as part of
its mission to validate and characterize exoplanets, as well as their stellar
environments, in search of life in the universe. Our current program uses
speckle interferometry in the optical (320-1000 nm) with new instruments on the
3.5-m WIYN and both 8-m Gemini telescopes. Starting with Kepler and K2
follow-up, we now support TESS and other space- and ground-based exoplanet
related discovery and characterization projects. The importance of
high-resolution imaging for exoplanet research comes via identification of
nearby stellar companions that can dilute the transit signal and confound
derived exoplanet and stellar parameters. Our observations therefore provide
crucial information allowing accurate planet and stellar properties to be
determined. Our community program obtains high-resolution imagery, reduces the
data, and provides all final data products, without any exclusive use period,
to the community via the Exoplanet Follow-Up Observation Program (ExoFOP)
website maintained by the NASA Exoplanet Science Institute. This paper
describes the need for high-resolution imaging and gives details of the speckle
imaging program, highlighting some of the major scientific discoveries made
along the way.
