The first ever galactic gamma-ray JETS have been discovered emanating from the milky way's disk, by Harvard scientists Meng Su and Finkbeiner studying Fermi images. Finkbeiner says "Shoving 10,000 suns into the galaxy center would do this." "A molecular cloud weighing 10,000 solar masses would make the influx of motion for the galactic core to fire up again." These jets are so close and are the only ones near enough for Fermi to be able to detect. They are at a 15 degree angle to the bubbles discovered in 2010, and of the same 27,000 light year length. Obviously they are a permanent ancient feature, and must be common in all galaxies. The scientists explain fully the electromagnetic phenomena forces of plasma rotation producing the jets, but always again the collaborators make up black holes as the reason for their formation, instead of just sticking to the facts. Birkeland pinches explain the influx of plasma that causes the jets.
http://holographicgalaxy.blogspot.com/2012/06/milky-way-gamma-ray-jets-produced-by.html
http://redorbit.com/news/space/1112544398/gamma-rays-from-milky-way%E2%80%99s-past-show-historically-active-black-hole