4 news briefings with live webcast previewing studies The American Society for Radiation Oncology (ASTRO) will host four news briefings with accompanying live webcasts on the top cancer research papers from its 51st Annual Meeting. News briefing 1 When: Monday, November 2, at 8:00 a.m. (Central); 9:00 a.m. (Eastern) What: News briefing with live webcast from ASTRO's 51st Annual Meeting.