Henri and María Teresa, the Grand Duke and Grand Duchess of Luxembourg, were visibly emotional at yesterday's National Day celebrations. It was a poignant moment for the couple, who have been on Luxembourg's throne for 25 years, as it was their last National Day as the reigning couple. Grand Duke Henri is abdicating in October, in favour of their son, Hereditary Grand Duke Guillaume, citing the need for a new generation of leadership. Henri became Luxembourg's monarch back in 2000, when his own