Greece has said it is determined to safeguard its borders
borders
Sources say the jets harassed a Greek helicopter
Turkey is escalating tensions with Greece
Continuous clashes with tear gas in Kastanies Evros
Erdogan said he did not want to be in the same room as Greek PM Mitsotakis after "killings" of refugees
84% expressed concerns over Turkey's stance
The government wants to send a clear message of deterrence
The Turks are marking those they send so that they can monitor and control their movements
A State Department official said the US was closely monitoring the situation on the Turkish-Greek borders
The majority of the illegal immigrants trying to enter Greece are almost exclusively males 18 to 25 years old