By Reuters Staff 3 Min Read WASHINGTON (Reuters) - The Pentagon and Republican congressmen on Tuesday aired fresh concerns about China’s build-up of its nuclear forces after a new report saying Beijing was building 110 more missile silos. FILE PHOTO: Military vehicles carrying DF-5B intercontinental ballistic missiles travel past Tiananmen Square during the military parade marking the 70th founding anniversary of People's Republic of China, on its National Day in Beijing, China October 1, 2019. REUTERS/Jason Lee/File Photo An American Federation of Scientists (AFS) report on Monday said satellite images showed China was building a new field of silos near Hami in the eastern part of its Xinjiang region.