A man looks at his mobile phone as he walks past flags during an Artificial Intelligence Action Summit at the Grand Palais in Paris, Monday, Feb. 10, 2025. (AP Photo/Michel Euler) PARIS — JD Vance is stepping onto the world stage for the first time as U.S. vice president this week, using a high-profile artificial intelligence summit in France and a gathering of national security leaders in Germany to showcase Donald Trump’s more assertive approach to diplomacy. The 40-year-old vice president, who was just 18 months into his tenure as a senator before joining Trump’s ticket, is expected, while in...