Drone warfare is now one of the most fundamental features of the U.S. battle against its enemies. Just don't ask anyone in the government to talk about it.
Since 2004, the United States military has fired about 270 missiles into Pakistan, killing thousands of militants, according to the U.S. government. Dozens of so-called high-value targets have been eliminated, like al-Qaida's No. 2, who was killed in an attack last month.
But since the CIA runs these attacks, they are secret. As a result, no one in the government is supposed to admit they're happening.