>> axelrod: tonight, state of emergency. a monster wildfire ragin ragingn california could threaten san francisco's power and water supplies. teresa garcia is on the scene. 50 years after martin luther king shared his dream, thousands of people retrace his steps. jeff pegues is on the washington mall. >> i'm not prepared to sit down and give up. >> axelrod: president obama weighs military options against syria, even as the regime denies responsibility for chemical attacks. holly williams has the latest. and school's out, but this bus has been bringing meals to hungry children all summer. don dahler takes us on a lunch break. >> they help you be healthy. captioning sponsored by cbs this is the "cbs evening news."