• Foreign Policy's Passport blog has rolling coverage.
  • The available evidence points to Russian separatist forces being responsible, but it is early days. In 2001 the Ukrainian military accidentally shot down a passenger plane.
  • The Aviationist: given quantity of anti-aircraft equipment in region, it was just a matter of time until a civilian airliner was hit.
  • In June, NATO's Supreme Commander warned that Russia was providing anti-aircraft weapons and know-how to the rebels.
  • The escalatory consequences of the MH17 shootdown, via War is Boring.
  • Popular Mechanics argues that this will be a watershed moment for efforts to curb anti-aircraft missile proliferation.
  • The plane is thought to have been shot down using the 'Gadfly' (NATO designation) air defence system. The Australian Air Power website has detailed technical analysis of that and other Russian air defence systems.
  • Here's a video alleged to be of a 'Gadfly' system being moved around by rebels.
  • A thorough look at Ukraine's surface-to-air missile network (dates from 2010).
  • PM Tony Abbott is quite properly reluctant to discuss what this incident means for Russian attendance at the G20 conference.
  • Michel Sidibé, UNAIDS Executive Director, has tweeted:
  •  And the City of Melbourne tweeted: