They said that it could not be done. Well, those of us who were thrilled to get laser pointers, rejoice: a team at MIT has created/invented/discovered a way to make light "hard" enough to be able to deflect off other beams of light.
It seems that when you blast photons through rubidium atoms, the particles join into "photonic molecules." Sounds like something out of some old pulp sci-fi, don't it? Well, it gets better--with lasers with a molecular structure, they can whack into each other and be deflected, just like lightsabers.