"Having men and women together in the battlefield is an incredible asset, particularly when they're asked to lead teams in parts of the world with fundamentally different expectations and norms," Biden said in his speech at a graduation ceremony at Michie Stadium on the West Point grounds along the Hudson River. Biden also warned the graduating class that it's facing a vast range of complex challenges, including battling Islamic State extremists, containing outbreaks of contagious diseases and defending against cyberattacks. "Whether it's fighting terrorism, training our partners, reassuring our allies or providing humanitarian relief, we call on you," he said. [...] right now, the stakes could not be higher.