Beijing upgrades nuclear arsenal By Demetri Sevastopulo in Washington Published: May 25 2007 20:21 | Last updated: May 25 2007 20:21 China is modernising and expanding its arsenal of nuclear weapons giving it an enhanced nuclear strike capability, according to a new Pentagon report on the Chinese military. The Pentagon said China was developing mobile, land-based intercontinental ballistic missiles in addition to long-range, submarine-launched ballistic missiles that would be deployed on a new fleet of nuclear submarines. ADVERTISEMENT A US defence official said the shift to mobile and sea-based missiles was an effort by the People’s Liberation Army to improve...