truck maker navistar fell to its lowest price since january. quarterly profits were disappointing thanks to costs for a new engine. finally, cablevision will split off its amc cable network. amc owns it's namesake cable channel, as well as the sundance and ifc-- independent film channel-- cable brands. this is the past 180 sessions. c-v-c shares jumped 4.5% up to its highest price since march. and that's tonight's "market focus." >> tom: one done, a few more to do. social networking web site linkedin was the first of what may be several social web sites going public. coupon web site groupon may be the next. but with high expectations comes high volatility. that brings us to tonight's "word on the street"-- "backbone." debra borchardt is a markets analyst at thestreet.com. so, deborah, you're looking at companies providing the backbone for social media web sites. what's really important here for investors to look at? >> well, i think what's really important is looking at these companies and what they're providing for these social networking site

paula dean furniture, navistar international donated our truck here today, and a special thanks to jimpenski trucks we're going to be using all week. they offered their dance floor for all the dancers you've got here. alaska kayaking big kayaks from johnson outdoors, old town canoe, wooden interior paint, worldwide moving club, worldwide for helping us get all of these donations to the right hand. and of course, a little bit different. we've got here michelle brown from -- she's the director of united way alaska. michelle, tell us about what you guys are doing. >> we've got this great coalition. love working with people like alaska pride. we've got a 40 something organizations, everybody living united to make sure our kids succeed in this town. >> in fact, we've got with us marta, the marketing director for apirca. >> we're excited at aprica. we design lightweight, easy to use products. we're donating 4,000 strollers for lend a hand across five cities with 3,000 going right here to alaskan charities. >> $821,000 worth of strollers. that is so huge. marta, thank you very much. and also