[Q]: China sets Bo Xilai trial date
China Bo Xilai trial in fourth day

[A]: 3

[Q]: Ballmer has been vocal in the past warning that Linux is a threat to Microsoft.
In the memo, Ballmer reiterated the open-source threat to Microsoft.

[A]: 3

[Q]: Obama cancels Moscow meeting with Putin
Obama canceled meeting with Putin

[A]:
4