Schenectady Walani Ndhlovu's journey from a dirt-floored hut in the African country of Malawi to Union College included a stop last week on stage with Tom Brokaw at Lincoln Center in New York City. Brokaw interviewed Ndhlovu at a gala for Maloto, a not-for-profit organization based in Nyack, Rockland County. The group helps educate orphaned and impoverished children in Malawi, one of the smallest and poorest countries in Africa.