Angelina Jolie was in head-to-toe black this morning when she boarded a helicopter to leave London. She and her six kids have been hanging out in the neighborhood of Richmond for the past few weeks while Brad Pitt works on World War Z, which just got a December 2012 release date. Angelina has been keeping busy with Maddox, Pax, Knox, Zahara, Shiloh, and Vivienne by exploring local toy shops and flower stores and even doing a paint-your-own-pottery outing. Angelina was worried about the riots in England, according to reports. Those fears prompted her to add to her security entourage.