US Secretary of Defense Lloyd Austin cancelled his participation in meetings on Ukraine and NATO due to health problems. He will not be travelling to Brussels this week as planned, Pentagon spokesman Pat Ryder announced in Washington on Monday. A meeting of the international contact group to coordinate arms aid for Ukraine on Wednesday will now take place virtually. Austin will take part if he is able to. He will be represented at the NATO defence ministers’ meeting on Thursday by the US ambassador to NATO, Julianne Smith. Austin, who is suffering from prostate cancer, was hospitalized on Sund…