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Breaking overnight, four men arrested in connection with to a deadly carjacking at upscale new jersey mall. 30-year-old dustin freeing land was shot and killed in front of his wife you will remember this just days ago as the two were finishing up christmas shopping and returning to their car. the couple's car was found the next day 10 miles away. details have not yet been released. a press conference is scheduled for 9:00 a.m. this morning. happening now, this is a live look at the international space station. nasa astronauts about to conduct a risky emergency spacewalk. they are trying to fix...

Tubes in it. the water circulates around your body to keep your heat down. if you don't have the cooling system, you're going to overheat. it's game over. you have to come inside. the water came from the mix of the air and water. a complicated system, but it does miracles that holds the spacesuits we have. that was where the water came from. from the cooling water mixed with the air incorrectly and ended up coming in to the suit. >> john, i want to go back to you quickly. you touched on earlier how serious the shutdown of this coolant pump is, but what happens if the astronauts can't fix it? i...

The door on saturday. >> reporter: a valve inside the pump failed over a week ago. complicating matters nasa has to carefully watch the crew's spacesuits. back in july, astronaut lucca's help mitt began mistierly filling with water. scary moments as others raced to get his helmet off. nasa still doesn't completely understand what went wrong. this will be the first walk since. >> all days spent with a lot of water chemists trying to figure this out. we've not yet said it will be fleet-wide. >> reporter: they don't expect the problem to repeat but are taking no chances. water absorbing pads have...

Astronauts could take breaths of air from the snorkle until they were able to get back into the space station and get their helmets off. but, didn't have any problem with either of the space suits. everything went very, very well on the first of the space walks as far as the safety of the astronauts is concerned. cnn, miami. chris hatfield is very familiar with emergency space walks. this past may, he took this photo from the space station as two of his crew members successfully fixed an ammonia leak. i asked him to share what it's like to float through space. >> and the big difference is, y...

Astronauts are making repairs to the international space station faster than expected. they started at 7:00 this morning and wrapped it up about five and a half hours later. for the first time, their space suits are outfitted with a snorkel to prevent their helmets from possibly filling with water. we're going to have a live report in our next hour. reuters reports they will limit debit card purchases to $300 per day. the move comes as target offers shoppers a 10% discount. 40 million americaning may have had their credit card data stolen in a massive security breach. we'll have more on how ...