like a hot-air baa log. the sun comes out to warm the ground and the air wants to rise. as the air rises into space it goes up higher and higher and gets into colder and colder air. so all the particles start to congeal down here. all the humidity comes in and then it goes straight up in the air. you can see the towering cumulus clouds, a lot like everything in the northern hemisphere that spins to the right and everything in the southern hemisphere that spins to the left. eventually if you move this stuff long enough on the way up, literally 60,000 feet in the sky, 12 miles from the surface to the top, you will get this spin and eventually the whole storm spins into the back half, we call it the mesocyclone, the conservation of mo pen tim momentum like an ice skater she skates faster and faster. at the bottom a tornado falls out and comes out of the storm. we ll have much more on the science of tornadoes and why this year has been so deadly
rooftops. people were marched to demand the release of political prisoners and the bullets rained down. and sarah palin thundering into d.c. today, but is she ready to roll into the presidential race? the best political team on television is weighing in. i m drew griffin. the news starts now. in the headlines tonight president obama went to joplin, missouri, today. it was his first chance to see the unimaginable damage caused by last sunday s ef-5 tornado. he spoke at a memorial service for the 142 known victims. a live look at the president s visit just ahead. and sarah palin drew attention riding on the back of a motorcycle in rolling thunder. despite all the symbolism of the moment, the former alaska governor insists she is just riding, not running, at least not yet. i m an american. i have no title, i have no office, and to be an american citizen with the freedom to come out here and assemble and thank our veterans, i can t tell you how honored i am. lockheed mart
the dow went down 300 points last week, but can the positive mo pen tim momentum continue? it was a pretty good week last week. the market is likely to get off to a slow start this morning. you hear the opening bell mind me. the blue chips jumped triple digits three sessions in a row. now, two of them were to the up side, but after last week s rally the dow is unchanged from where it started the year. fedex is poosting its forecast for the year. they are one of the bell weather companies, so that s good news for the economy, but the focus this week remains on corporate earnings. more than 150 companies are slated to post their results over the next couple of days. that includes industry leaders like exxonmobil, boeing, dupont