The three images of the MH17 crash site (below) were taken by U.S. commercial remote-sensing services provider DigitalGlobe in October 2012 using its WorldView-1 satellite. Scroll down to see images of the same site taken by WorldView-1, WorldView-2 and QuickBird July 20 and 21.
These high-resolution images of the MH17 crash site (below) were taken July 20 and 21 by DigitalGlobe using its Quickbird, WorldView-1 and WorldView-2 optical imaging spacecraft.
DigitalGlobe has supplied downloadable KMZs of pre-MH17 imagery (http://goo.gl/225JTa) and post-MH17 imagery (http://goo.gl/1OfuC5) to Google Plus, images that were collected July 16 and 20. They've also told me that cloud cover prevented clear shots of the area on July 17, the day of the crash.