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Nov 22, 2017 : The WFIRST Independent External Technical/Management/Cost Review (WIETR) Presentation to the Committee on Astronomy & Astrophysics (PDF)
Oct. 19, 2017 : NASA has received the report from an independent, external review of the Wide Field Infrared Survey Telescope project. The review was commissioned by NASA to help ensure that the mission is well understood in terms of scope and required resources, and is executable.
April 27, 2017 : NASA is initiating an independent, external review over the next several months on the scope of the Wide Field Infrared Survey Telescope (WFIRST) project to help ensure it would provide compelling scientific capability with an appropriate, affordable cost and a reliable schedule.