DURHAM, N.C. -- At shopping malls across the region, Santa Clauses are greeting lines of children and listening to their Christmas wishes. But some parents don't like the homogeneity of the men behind the white beard and red suit, and one group of mothers is bringing diversity to the North Pole. "We would like to see Santas of all ethnicities that represent all children," said Tammy Cruell, of Mocha Moms, a group of African-American stay-at-home mothers. Mocha Moms plans a Dec. 10 party at the Hayti Heritage Center, in Durham, that will feature the only African-American Santa in the region...