SpaceX rocket avoids close call with space junk

Four astronauts are on their way to the International Space Station after a successful launch early Friday.
1:54 | 04/24/21

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Transcript for SpaceX rocket avoids close call with space junk
Martha, thank you. Tonight we're learning of a close call for astronauts aboard the space-exdragon. Coming within 100 feet of space junk. What does this all mean? Here's gio Benitez tonight from Florida. And liftoff! Reporter: Tonight, hours after this picture-perfect predawn launch from the Kennedy space center lit up the skies up and down the east coast -- It's an invasion! It's a ufo! Reporter: A close call for the spacex crew dragon. Space junk threatening the ship. The crew scrambling to get back inside their pressurized suits. The space junk traveling at more than 17,000 miles per hour, coming within about 100 feet of the crew dragon, but missing it. Before the scare, the stronauts giving a live tour. And this is what we get to see, coming up on Madagascar. Reporter: Megan Mcarthur sitting in that same pilot's seat her astronaut husband Bob Behnken sat in just last year on the same spaceship. Bob and son Theo sending mom off with an air hug. I'm like a baby bird here, relearning how to move around in microgravity. It feels really good, but it feels a little bit weird too. Reporter: Spacex making history by successfully re-using a crew dragon spaceship for the first time. And gio Benitez now with us from the Kennedy space center gio, we know the astronauts are headed to the space station to do scientific and medical research, but Thi was a little bit alarming when we learned of the space junk spotted close to the spacecraft because we Moe it doesn't take a large object to create potentially dangerous damage. Reporter: We're talking about more than 17,000 miles per hour. Anything could be catastrophe. But the good news is they're now tracking that space junk and they should be docking tomorrow morning. David? Gio Benitez at Kennedy space center, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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