Some 800 U.S. Marines arrived in Haiti on Tuesday, in addition to members of the Army's 82nd Airborne division. As the U.S. troop presence builds there, Jim Lehrer speaks with a pair of experts about the military's mission in the…
Ray Suarez is in Durban, South Africa, reporting on the deadly airborne disease tuberculosis, which has been nearly wiped out in some parts of the world but is flourishing among the South African population, especially those weakened by HIV.
By Admin, PBS NewsHour
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