There was the following article in the Time magazine’ (February 11) titled “Drone home,”
“According to reports in the New York Times and elsewhere, the Obama administration conducts so-called signature strikes, which are aimed not at specific high-level targets but at any person or people whose behavior conforms to certain suspicious patterns."
I understand that what “Signature strike” means with the line modified by which clause after the words, signature strikes in the above article and with the following statement in the Wired (11/04/11)
The CIA is now killing people without knowing who they are, on suspicion of association with terrorist groups. The article does not define the standards are for “suspicion” and “association.” Strikes targeting those people — usually “groups” of such people — are called “signature strikes". –wired 11/04/11
I’m curious to know the etymology of “signature strikes.” I mean, why CIA operation aimed at any suspicious people who are judged to be associated with terrorist group is called “Signature” strikes?
OALED defines “signature” other than 'your name as you usually write it at the end of letter'as:
the act of signing sth.
a particular quality that makes sth different from other similar things and make it easy to recognize.
I can’t relate either of the above definitions to the definition of “signature” strikes given by both the Time and the Wired.