General Electric wants to build a $1 billion 3D-printing empire

Inside Science Industrial titan General Electric Co. announced on Tuesday plans to acquire two industrial metal 3D printing companies, Sweden-based Arcam AB and Germany-based SLM Solutions Group AG, for a total of $1.4 billion.  If the combined deal is approved, it will be by far the largest deal ever in the burgeoning 3D printing realm, and will mark GE's move beyond being just the world's largest user of metal 3D printing technologies to also becoming a leading supplier of them.   Here'...