US President Barack Obama marked the 70th anniversary of the liberation of Auschwitz with a warning that the world needs to combat resurgent anti-Semitism.
The White House said it hoped to work closely with Greece's new government after the radical left-wing Syriza party stormed to power on an anti-austerity platform.
Microsoft reported that its quarterly profit dipped but revenue increased in a sign that it is adapting to lifestyles centered on mobile devices and cloud services.
Iran warned the US Congress against imposing new sanctions, saying this would lead to a collapse of negotiations over Tehran's controversial nuclear programme.
Hours into historic US-Cuba talks in Havana, a Cuban official came out to boast about the "relaxed" atmosphere at the meeting between the old Cold War adversaries.