ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Hundreds of Thai office workers join rallies in their lunch break, showing their solidarity with protesters.<br/> <br />The protesters and leaders of the opposition Democrat party are demanding the resignation of Prime Minister Yingluck Shinawatra.<br/> <br />They marched to the U.S. embassy to hand over a letter explaining their demands.<br/> <br />The protesters say Yingluck's government is controlled by her brother -- the ousted former leader Thaksin Shinawatra who they claim is corrupt.<br/> <br />They accuse her of using her party's majority to push for laws that many say would have allowed the return of Thaksin, without having to serve jail.<br/> <br />On Thursday, protesters rejected Yingluck's call for dialogue, deepening a conflict that broadly pits the urban middle class against the mostly rural supporters of Thaksin, a divisive billionaire ousted in a 2006 military coup and central to Thailand's eight years of on-off turmoil.<br/> <br />Yingluck has ruled ou
