CREATE TABLE table_14429 ("Estimate" TEXT, "Name" TEXT, "Nat." TEXT, "Ship Type" TEXT, "Principal victims" TEXT, "Where sunk" TEXT, "Date" TEXT)

Who were the victims of the US ship that sank in the Mississippi River near Memphis?
SELECT "Principal victims" FROM table_14429 WHERE "Nat." = 'us' AND "Where sunk" = 'mississippi river near memphis'
SELECT "Principal victims" FROM "table_14429" WHERE "Nat." = 'us' AND "Where sunk" = 'mississippi river near memphis'