Lot 2: DAVID HAMMONS, “African-American Flag,” 1990 (dyed cotton, edition of 5). | Estimate $700,000-$1,000,000. Sold for $2,050,000 (including fees)   NEARLY THREE DECADES AGO, David Hammons hoisted his newly created red, black, and green “African-American Flag” (1990) above Museum Overholland. He was participating in “Black USA,” a group show organized by Christiaan Braun, director...