This material was used for both I Have Been to the Mountain in the MLK Reflection Park and Hero (-5[1])Construction by Richard Hunt. Dia Beacon and the Guggenheim Bilbao dedicate large rooms to Torqued Ellipses of this material. Before dying in a 1965 car crash, an abstract expressionist sculptor used this material for the Agricola and Cubi series. A debate over public art ended in federal workers forcing the removal of a slab of this material (-5[1])from Foley Square. This (10[1])favorite material of David Smith makes up large site-specific pieces like Tilted Arc by Richard Serra. (-5[1])An artist painted (10[1])this material vermillion for an arcing sculpture at Chicago’s Federal Plaza titled Flamingo. For 10 points, the monumental “stabiles” of Alexander Calder are welded together from the COR-TEN type of what metal? ■END■ (10[4]0[3])