A US Senate hearing highlighted China's rapid and unprecedented expansion of its nuclear capabilities, including the construction of new missile silos, just hours before President Trump's meeting with President Xi Jinping.

A US Senate hearing on nuclear capabilities issued a warning about China on Wednesday, hours before US President Donald Trump was due to meet Chinese President Xi Jinping. Senator Roger Wicker, the Mississippi Republican who chairs the Senate Armed Services Committee, said in his opening statement that China has been engaged in an “unprecedented nuclear expansion” in recent years. China, Wicker said, had “rapidly constructed hundreds of new missile silos, expanded mobile missile and ballistic...