An A.I.-Generated Picture Stokes a Stock Market Plunge

An A.I.-Generated Picture Stokes a Stock Market Plunge

A stock sell-off driven by a since-debunked picture underscored fears about how artificial intelligence could be used for nefarious purposes with big consequences.
‘Rip and Replace’: The Tech Cold War Is Upending Wireless Carriers

‘Rip and Replace’: The Tech Cold War Is Upending Wireless Carriers

As China and the United States jockey for tech primacy, wireless carriers in dozens of states are tearing out Chinese equipment. That has turned into a costly, difficult process.