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A decision which was announced in December of 2015 per https://www.arianespace.com/press-release/esa-and-arianespace-ink-james-webb-space-telescope-jwst-launch-
by allenrb 4y ago
A decision which was announced in December of 2015 per https://www.arianespace.com/press-release/esa-and-arianespace-ink-james-webb-space-telescope-jwst-launch-contract/ https://www.arianespace.com/press-release/esa-and-arianespac...
Of course, not much has changed since then…