Dr Jon Whiteley, a curator at the Ashmolean Museum in Oxford, which houses the famous Messiah Stradivarius agrees the quality "depends heavily on the shape of the instrument."

Two of the main problems facing any supersonic aircraft are increased drag, meaning increased fuel consumption, and that famous , a loud gunshot-like noise that disturbed anyone unfortunate to be under the flight path.

Tonight, I can report to the American people and to the world that the United States has conducted an operation that killed Osama Bin Laden, the leader of al-Qaeda, and a terrorist who's responsible for the murder of thousands of innocent men, women and children.

1850s - Gold is found at several locations leading to gold rushes throughout the decade. The population increases three-fold in 10 years to pass the million mark. An influx of Chinese leads to restrictions on their entry. Aborigines are treated very badly and their numbers collapse.

At 80 years old, Syed Shah has lived through all Afghanistan's turmoil. He has seen foreign invaders come and a royal dynasty go, Afghan armies plunder and murder, his nation wrecked by wars.