Addressing the nation on Thursday, Joe Biden presented a passionate case that he should become the next president. Unfortunately, when it came to the national security element of Biden’s speech, major questions remained unanswered. There was a lot of rhetoric here, and very little of substance.

That matters, because the 2021-2025 world will not conform to Biden’s rosy rhetoric of rebuilt alliances and restrained adversaries. As President Barack Obama belatedly learned, the pursuit of national security and the advance of American values requires both hard work and hard choices. Here are five big foreign policy questions Biden didn’t address on Thursday.