U.S.-China battle over Huawei comes to head at tech show

A global battle between the U.S. government and Chinese tech company Huawei over allegations that it is a cybersecurity risk will overshadow the opening on Monday of the world’s biggest mobile industry trade fair. Huawei has an outsize presence at MWC Barcelona, a four-day industry showcase of mobile devices and innovations that’s expected to draw 100,000 visitors. The focus at this year’s meeting is new 5G networks due to roll out in the coming years. But the dispute over Huawei, the world’s biggest maker of networking gear, is casting a pall.