Helmet Check News Today : Breaking News, Live Updates & Top Stories | Vimarsana

They've been out there for a few hours already. two astronauts were scheduled to spend about 6 1/2 hours outside the station today, but that has been extended. they're working to fix a critical cooling system. nasa is also taking special precautions today after an italian astronaut almost drowned on a space walk when his helmet filled with water while back. john zarella is following the space walk. what kind of progress is being made, john? this is painstaking, isn't it? >> reporter: it's unbelievable progress, though. first of all, no issues with the flooding of the helmet like luca parmitano...

>> there this is a modular egress similarity. it's modular because each one of the panels on the outside can be exchanged with any of the panels you see around the building. >> might be a helicopter if i see an airplane, it might be a normal car or a truck? >> exactly. >> flight suit check, helmet check, let the dunking begin. i guess i have got to get in this bad boy. >> give me the steps breakdown. >> take your hand and use a reference point off of your hip to help you find the door handle. once you find the door handle open it release the seat belt with your right hand and begin pulling you...