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US Deputy Energy Secretary Dan Brouillette speaks during a press conference with the German Economy Minister on February 12, 2019 at the Economy Ministry in Berlin after they held talks over Europe's gas supply. - Germany will put on a show of unity with the United States February 12, 2019 in talks on importing natural gas, as Berlin battles accusations an under-construction pipeline deepens European energy dependence on Russia. (Photo by Odd ANDERSEN / AFP) (Photo credit should read ODD ANDERSEN/AFP via Getty Images)

US Deputy Energy Secretary Dan Brouillette speaks during a press conference with the German Economy Minister on February 12, 2019 at the Economy Ministry in Berlin after they held talks over Europe's gas supply. - Germany will put on a show of unity with the United States February 12, 2019 in talks on importing natural gas, as Berlin battles accusations an under-construction pipeline deepens European energy dependence on Russia. (Photo by Odd ANDERSEN / AFP)        (Photo credit should read ODD ANDERSEN/AFP via Getty Images)