March 8, 2012 -- Updated 1737 GMT (0137 HKT) March 13, 2012 -- Updated 1408 GMT (2208 HKT) Marine Le Pen, leader of France's far-right National Front party, has officially entered the French presidential election race. March 13, 2012 -- Updated 1632 GMT (0032 HKT) A Leonardo da Vinci mural unseen since the 16th century may have been found hidden behind a fresco painted by another artist. March 13, 2012 -- Updated 1715 GMT (0115 HKT)