 on the space station where the crew would have to return very quickly back to Earth. No return date has yet been set. Mark Remillard, ABC News. A surge in travel is expected over the 4th of July weekend. Here's Phil Lipoff with some tips. Travel with a carry-on if you can instead of checked bags to save some time. You can also save some money. American Airlines predicts its busiest July 4th ever, up 8% from last year. Delta says it expects at least 6 million customers.