Picasso’s Guernica is the ultimate emblem of the horrors of war. It has no place in Spain's partisan squabbles | María Ramírez

Forty years after the 1937 masterpiece returned to Madrid from its Franco-era exile in New York, it is again embroiled in politicsEvery September, Spain celebrates one of the most symbolic moments of its transition to democracy. This year will mark 45 years since an Iberia commercial flight from New York landed in Madrid with its pilot announcing to the surprised passengers that they had just travelled with one of the country’s most famous exiles: Pablo Picasso’s Guernica. After more than four d...