I wouldn't worry about it too much. I've worked on a small dedicated hardware/software team with a multi-year focus overcoming challenging technical obstacles.

I wouldn't worry about it too much. I've worked on a small dedicated hardware/software team with a multi-year focus overcoming challenging technical obstacles. We certainly weren't flying a helicopter on a remote planet, but the closeness and shared vision were similar. They know what they did and they know that they did it together. While hugging and other demonstrative behaviors are wonderful and should be cherished, they are trivial compared to the internal feelings of accomplishment and gratitude to have been a part of such of an effort with such a talented team. Those feelings and their shared bonds will stay with them forever.