Bloomberg Philanthropies today announced the winners in its 2014 Mayors Challenge, an ideas competition that encourages cities to generate innovative ideas that solve major challenges and improve city life - and that have the potential to spread to other cities.

In “Reverb: New Art From Greece”, at the School of the Museum of Fine Arts in Boston, Greek artists interpret newsmaking events of recent history.

At 8.15 pm, controversial pop star Lady Gaga arrived at the Athens International Airport, making an eccentric appearence posing through the crowd. Her show in Athens is this Friday.