I don't think that's the first image in the sequence, just the most famous one. They took a lot of images in sequence. Here they are edited together into a sequ

I don't think that's the first image in the sequence, just the most famous one. They took a lot of images in sequence. Here they are edited together into a sequence (several series, presumably from multiple tests, unfortunately looks a bit incomplete): https://m.youtube.com/watch?v=KQp1ox-SdRI https://m.youtube.com/watch?v=KQp1ox-SdRI