detectives have identified four close contacts they'll be actively monitoring while the bowling alley is being completely scrubbed. they are taking no chances. here in new york, the words no one wanted to hear. >> today testing confirmed that a patient here in new york city had tested positive for ebola. >> reporter: inside bellevue hospital, 33-year-old dr. craig spencer who had been in guinea fighting ebola for doctors without borders. he returned to new york via brussels last week. early thursday, his temperature hit 103 degrees. one of the first signs of ebola. emts in protective gear rushed him to bellevue hospital which had spent recent weeks holding drills, preparing for the possibility of ebola striking america's largest city. is this a worst case scenario, ebola in new york? >> it's really not. new york city has one of the best health departmhe couy