Yes, you can break the agreement if they don’t meet aid.
It depends on what your priorities are.
If you only want to go to the US if you can go to Cornell (or a similar top-tier program), and you have other choices in your home country (or other countries), then go ahead and apply ED.
Your chances, bluntly, are tiny: there are about 300 international students in a first year class of ~2200 students. You are asking Cornell to essentially give you a $300,000 college education for free. For that, they want a superstar.
If your goal is to get to the US no matter what, then you need to look at universities where you would be considered a star, and the actual ‘cost’ to the university of subsidizing your education would be less. That means schools you haven’t heard of. Even then, it is going to be hard.
Also, be aware that many colleges are squidgy about having international students in aerospace. Not saying it doesn’t happen, but it is a field where there can be both explicit and de facto barriers for non-nationals.