(left to right) German Chancellor Angela Merkel, Ukrainian President Petro Poroshenko, Belarusian President Alexander Lukashenko, and Russian President Vladimir Putin, walk together to continue their peace talks in Minsk, Belarus on Feb. 11, 2015.
Pablo Martinez Monsivais—AP
President Barack Obama and German Chancellor Angela Merkel during their joint news conference in the East Room of the White House in Washington on Feb. 9, 2015.
Russia's President Vladimir Putin, France's President Francois Hollande, Germany's Chancellor Angela Merkel and Ukraine's President Petro Poroshenko attend a meeting on resolving the Ukrainian crisis in Minsk, Belarus, Feb. 11, 2015.
Samuel Corum—Anadolu Agency/Getty Images
President Barack Obama speaks during a joint press conference with German Chancellor Angela Merkel after a meeting in the East Room of the White House in Washington D.C. on Feb. 9, 2015.
Fabrice Cofrini—AFP/Getty Images
German Chancellor Angela Merkel attends a session of the World Economic Forum (WEF) annual meeting on Jan. 22, 2015 in Davos.
Chancellor Angela Merkel in the lower house of parliament Bundestag in Berlin, Nov. 26, 2014.
Sasha Mordovets—Getty Images
Russian President Vladimir Putin (C) attends a meeting with German Chancellor Angela Merkel (L) and French President Francois Hollande (R) on Feb. 6, 2015 in Moscow, to discuss the conflict in Ukraine
Milos Bicanski—Getty Images
Protesters hold a banner as they march during a demonstration against the visit of Germany's Chancellor Angela Merkel on April 11, 2014 in Athens.
Kai Pfaffenbach— Reuters
Leaders of the Christian Democratic Union sing with Chancellor Angela Merkel as they celebrate the exit polls in the German general election at the party headquarters in Berlin, Sept. 22, 2013.
Peter Parks—AFP/Getty Images
Germany's Chancellor Angela Merkel (C) is welcomed upon her arrival at the airport in Brisbane to take part in the G20 summit on November 14, 2014.
French President Francois Hollande is surrounded by head of states including Israel's Prime Minister Benjamin Netanyahu, Mali's President Ibrahim Boubacar Keita, Germany's Chancellor Angela Merkel, European Council President Donald Tusk and Palestinian President Mahmoud Abbas as they attend the solidarity march in the streets of Paris Jan. 11, 2015.