The signatures of late US President Ronald Reagan (top left) and late Soviet leader Mikhail Gorbachev (top right) are seen on a guest book at the Hofdi House prior to the arrival of US Secretary of State Marco Rubio, as part of a European visit, in Reykjavik on October 6, 2026. US Secretary of State Marco Rubio starts in Iceland a three-nation European tour to push for greater US influence in the Arctic after Washington sealed a pact on Greenland. After Iceland, Rubio continues to Athens to participate in a "strategic dialogue" with NATO member Greece on regional and energy security before heading to Portugal. (Photo by Mark Schiefelbein / POOL / AFP via Getty Images)