dick van dyke has been forced to cancel an appearance in new york because of an undiagnosed neurologicalisorder. he's asking for help with a diagnosis. on his twitter account, dick van dyke solicited assistance in figuring out what he's got. a throbbing condition in his head when he tries to lie down. it's led to lack of sleep and fatigue. it has eluded tests and scans so far. dick van dyke is 87 years old. >>> and some good news to report from the world of public health. the nation's infant mortality rate fell by a full 12% in the years '05 to 2011, having been static for years. the biggest change for the better was in the south. but the u.s. still ranks an embarrassing 27th in infant mortality among the world's 30 leading developed nations. >>> another problem for carnival cruise line. this time on board the "ecstasy." it lost power at sea while sailing off the coast of florida with 2,000 passengers on board. the cruise line says there was no fire, no emergency. power was eventually restored. >>> when we come back here tonight, the amazing moment from last night in boston. >>> finally

dick van dyke said the first time i saw jonathan winters perform i thought i might as well quit the business because i could never be as brilliant. he spoke to tom brokaw in 1971. >> i just hope i live to be an old man. i really do. >> reporter: jonathan winters was 87. kevin tibbles, nbc news, chicago. >> that is our broadcast on a friday night and for this week. thank you for being here with us. don't forget, we are back on the air tonight with an all new "rock center" at 10:00/9:00 central. i'm brian williams. lester holt will be here with you this weekend. we, of course, will look for you back here on monday night. in the meantime please have a good weekend. in the meantime please have a good weekend. good night. -- captions by vitac -- www.vitac.com now. >>> good evening on this friday night i'm jessica aguirre. >> and i'm raj mathai. we begin with the latest on the investigation of a sexual assault on a 15-year-old teenager named audrie pott. she took her own life days after the attack. it is a troubling story we reported last night. our usual policy is not to identify the victims of s

dick van dyke said the first time i saw jonathan winters perform i thought i might as well quit the business because i could never be as brilliant. he spoke to tom brokaw in 1971. >> i hope i live to be an old man. >> reporter: jonathan winters was 87. for "today," kevin tibbles, nbc news. >> we'll be right back. first, this is "today" on nbc. . >>> good morning. live at san jose, twinkling lights. you can expect breeziness. and what else? let's check with rob mayeda. rob says good weather for whatever you have planned. >> a little bit cooler than the weather we saw yesterday. outside right now, 40s and 50s for morning temperatures around the north bay. down to 43 degrees. winds coming in off the ocean. we'll see more of that through the day today. and a few high clouds. the system will be just missing the bay area will be tossing showers across the pacific northwest. for us, winds picking up at times. we'll see the numbers a little bit cooler. probably no 80s in the forecast for this weekend. but still pretty nice. 70 in san jose. 62 in san francisco. and tomorrow, expect to see temperature