How engineers are straightening the Leaning Tower of Pisa
PISA: "It's still straightening," said engineer Roberto Cela, gazing at the Leaning Tower of Pisa gleaming in the autumn sunshine of northern Italy. "And many years will have to pass before it stops."
The gravitationally-challenged landmark is leaning less after years of ambitious engineering work. Fortunately for the millions of tourists who come here every year, the 57-metre (186-feet) tower remains beautifully askance.
The medieval bell tower, a symbol of the power of the maritime republic of Pisa in the Middle…