Intersecting domain walls in MQCD
  We argue that MQCD admits intersecting domain walls that are realized as Cayley calibrations of the MQCD M5-brane. We discuss various dual realizations and comment on how branes can realise domain walls in N=1 supersymmetric theories in D=3. 
Jerome P. Gauntlett, Gary W. Gibbons and Paul K. Townsend