AN envelope found at the Indonesian embassy in Canberra today has tested positive for a biological agent. The embassy has been shut down and its 22 staff will remain in isolation for at least 48 hours after the envelope tested positive for an as-yet unidentified biological agent. Foreign Minister Alexander Downer condemned whoever had sent the package and said the incident would not help Corby's case. "Further analysis of the powder has tested positive as a biological agent so further testing will need to be carried out to find out what that substance actually is," Mr Downer told Parliament. "As...