captioning sponsored by macneil/lehrer productions lehrer: good evening, i m jim lehrer. on the newshour this thursday, the lead story, what s ahead for health care reform, kwame holman and judy woodruff have our lead story coverage. then, after the other news of the day, the latest on the bombing of the indian embassy in kabul and margaret warner talks to the afghan ambassador to the u.s. betty ann bowser reports on the start of the campaign to inoculate americans against the swine flu. within the next two to three weeks, we re going to have tens of millions of doses available. lehrer: lee hochberg traces the source of tainted food. where do these coming from? what part of mexico do they come from? i couldn t tell you. lehrer: and jeffrey brown looks at first lady michelle obama s roots, from slavery to the white house. major funding for the newshour with jim lehrer is provided by: this is the engine that connects abundant grain from the american heartland to har