Facebook parent Meta Platforms faces a high-stakes trial in Washington starting on Monday on claims it built an illegal social media monopoly by spending billions of dollars to acquire Instagram and WhatsApp, in a case where U.S. antitrust enforcers seek to unwind the deals.

Australia has swiftly turned down China's offer to "join hands" against Donald Trump's tariffs, as Washington escalates its trade war with Beijing. The White House recently imposed an import tax of 10% on Australian goods,