From http://en.wikipedia.org/wiki/Drone_strikes_in_Pakistan
And just to not be accused of partisanship, at the end of the writeup it says:These strikes began during the administration of U.S. President George W. Bush, and have increased substantially under U.S. President Barack Obama.[22] Some in the media have referred to the attacks as a "drone war".[23][24] Initially the U.S. government had officially denied the extent of its policy; in May 2013 it acknowledged for the first time that four U.S. citizens had been killed in the strikes.[25] Surveys have shown that the strikes are deeply unpopular in Pakistan, where they have contributed to a negative perception of the United States.[26]
There is a debate regarding the number of civilian and militant casualties. An estimated 286 to 890 civilians have been killed, including 168 to 197 children.[19][20] Amnesty International found that a number of victims were unarmed and that some strikes could amount to war crimes.[27]
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several experts have stated that in reality, far fewer militants and many more civilians have been killed
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since President Obama took office at least 50 civilians were killed in follow-up strikes when they had gone to help victims and more than 20 civilians have also been attacked in strikes on funerals and mourners, a practice condemned by legal experts.
In May 2014, the targeted killing program was described as "basically over," with no attack having occurred since December 2013. The lull in attacks coincided with a new Obama Administration policy requiring a "near certainty" that civilians would not be harmed, a reduced US military and CIA presence in Afghanistan, a reduced al-Qaida presence in Pakistan, and an increased military role (at the expense of the CIA) in the execution of drone strikes.[50][51]
and from here http://www.washingtonpost.com/blogs/won ... -one-faq/
According to the Post database, there have been 347 in Pakistan, 53 in Yemen and 2 in Somalia. From 2008 through October 2012, there were 1,015 strikes in Afghanistan, 48 in Iraq, and at least 105 in Libya according to the Bureau for Investigative Journalism. That does not include strikes in Libya past September 2011, strikes from 2001 to 2007 in Iraq and Afghanistan, and those since October 2012. The New York Times' Mark Mazzetti reported that at least one strike has happened in the Philippines.