![click for larger image](http://3.bp.blogspot.com/-yeenmi2Wy3U/USM2m-xjfmI/AAAAAAAAEWY/AtBSNaDUprg/s320/dublin_night_iss_180213_opt.jpg)
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His tweet, with its Irish language content, evoked immediate warm responses from below leading to his own further response above. You can see his original tweet with ground responses here and his own further response and further responses from the ground here.
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Commander Chris Hadfield - website