Kirsten Korosec / TechCrunch: Amazon has canceled re:MARS 2020, its annual AI event scheduled for June 16 to 19 in Las Vegas  —  Amazon has canceled re:MARS 2020, an annual AI event that focuses on machine learning, automation, robotics and space, over concerns about the COVID-19 pandemic.  The event was scheduled to be held June 16 to 19, 2020 in Las Vegas.