Chinese navy's behaviour prompted Singapore to buy submarines

Asahi.com, 15 Jun 2010
PEARL HARBOR, Hawaii--Repeated Chinese navy helicopter flights close to Japan's Self-Defense Force ships in the East China Sea and the Western Pacific in April were neither professional nor responsible, says the commander of the U.S. Pacific Fleet, Adm. Patrick Walsh.
Walsh expressed concern about China's increasingly aggressive behavior in the South China Sea.
In reaction to China's disturbing behavior in the South China Sea, several littoral states such as Vietnam and Singapore are now purchasing submarines "as a way of protecting sovereign rights," Walsh said. Full Story