By Paul Dibb*
Two important military developments recently should give China pause for thought. The first one is the announcement by Prime Minister Scott Morrison of a $1.1 billion upgrade to the Royal Australian Air Force base at Tindal, which is about 300 kilometres south of Darwin, to lengthen the runway so that US B-52 strategic bombers as well as our own KC-30 air-to-air refuelling aircraft can operate from there.