In 10 minutes: hear from @nasa/@esa/@csa_asc #JWST project manager, Bill Ochs, & other team members on the results of the major cryovac testing done on the observatory at @NASA_Johnson last year. Not long until launch from Kourou in spring 2019. https://t.co/VFDH7hYn72

— Mark McCaughrean (@markmccaughrean) January 10, 2018