Diwali is also a festival of lights. In India, it is customary to light lanterns and candles as a symbol of the victory of good over evil. In London, concerts and fairs are held in honor of Diwali. This year, the festival was attended by the mayor of the city, Sadiq Khan. He has Pakistani roots, and he tries to unite the different communities of the city. Guest of the festival: "London has always been...