Keith's note: NASA is holding a Viking 40th Anniversary Symposium at NASA LaRC on 19 & 20 July. This event has quite a line up of speakers for something that ought to resonate with #JourneyToMars (their poster even uses the hashtag). So ... when are NASA LaRC or NASA HQ going to tell people about this? There is nothing online at NASA LaRC, on the NASA HQ Journey To Mars webpage, or at NASA.gov calendar. I only heard about this via a NIA email notice for the live webcast and agenda.
Keith's update: PAO tells me that they just got approval to start talking about this event.