[Location - Date:Ankara, Turkey][Source:Turkey pool][VO:turkey lamakers][VOICE-OVER]Turkey has come out with its clearest and fiercest response yet to the downing of one of its military planes by Syria.[Notes:Turkey PM]Officials in Ankara now say they will treat any Syrian military unit approaching its border as a direct threat.(NAT SOUND TURKISH)The country's prime minister says the rules of engagement have changed and that approaching Syrian forces will be treated as military targets.[Notes:File VO of search]This comes days after Syrian forces shot down an unarmed Turkish military plane that it says crossed into its air space.Turkey though says the plane was in international airspace when it was shot down.[Notes:Map]Syria has since said the shooting was accidental, either way though it has aggravated already tense ties between the two who share a 566 mile-long border. __________ The Associated Press