What is space flag exercise?

As an AI language model, I don't have access to the latest news and current events. However, based on my previous knowledge, the space flag exercise is a joint military drill conducted by several countries to prepare their soldiers for potential space warfare. The exercise involves simulating a range of potential scenarios that troops could face in space, including the deployment of anti-satellite weapons and space-based defense systems. The countries that participate in the exercise use it as an opportunity to share information on their latest space technologies and to develop new ways to work together in space.