rained down. and sarah palin thundering into d.c.ed to. but is she ready to roll into the race for president? i'm drew griffin. the news starts now. first tonight, is yemen tipping into civil war? take a look at this. troops and anti-government protesters in the southern city of taiz. tear gas and gunfire. all this increasing fear that turmoil will give al qaeda and other slaul islamic militants breathing room to launch attacks against the u.s. i spoke earlier with cnn's mohammad jamjoom in abu dhabi about that. >> earlier -- today more pictures showing security forces in the city of taiz firing on these protestors from rooftops in nearby buildings. take a listen to some of the shots as you can hear on these