In many ways, art cannot be separated ... artwork is used as a vehicle for protest everywhere—from Ai Weiwei’s “S.A.C.R.E.D,” to Barbara Kruger’s untitled photograph that states ...

After a four-year absence in New York galleries, Barbara Kruger has returned to action with a vengeance, showing sculpture at Mary Boone, an installation at Jeffrey Deitch and a bus-as-artwork ...