Well when you deal the cards and have a spare set in your back pocket you have to win all the time.)
Though I would make it a 50/50 issue re drones and the fact the PA are actually doing something the North Waziristan militants are not happy about. Perhaps they see themselves next on the list. Naturally get in first and you get the physiological edge.
The drone excuse can also be one of attempting to get public support.
Anyway just guesses.