China warns US over Pelosi's Taiwan visit I US Navy steps up presence

A US aircraft carrier and strike group have entered the South China Sea as part of what the 7th Fleet said was a scheduled operation amid rising tensions with China over a potential Taiwan visit by House Speaker Nancy Pelosi. U.S. Defense Secretary Lloyd Austin said on Wednesday he had spoken with Pelosi and given her a security assessment but any comments about a trip she might make to Taiwan would have to come from her office. Watch this video for more.