Times Online - There is a pleasing regularity to the rites of the Berlin spring. At the start of April the city gorges on the first harvest of white asparagus. On May Day left-wing revolutionaries gather in the streets to torch cars and heave paving stones at the police in the name of solidarity. And then, as the prospect of hazy summer days begins to loom, Berliners discover the latest slapstick reason why their long-delayed international airport cannot open.