for the safety to be able to rescue the people on board but also to be able to provide safety for our crews. christina coleman is joining us with the latest. tough situation here. it sure is, rob. a large burning cargo ship on its side. that s what the coast guard was up against as they worked to save 20 crewmembers from the vessel early this morning. at this point, four crewmembers are still unaccounted for. the intense smoke and fire made it just too dangerous for rescue crews to stay on board to try and find the four missing crewmembers this morning. once it is safe to go back on the vessel, the search will continue for the missing people on the ship. the 656 foot vehicle carrier is completely on its side. the coast guard was notified that it capsized around 2:00 a.m. the ship was leaving the port of brunswick, which is a major deepwater port in georgia, about 65 miles south of savannah. the ntsb is investigating. they will be working hard to try and figure out what caused the