The military is dramatically upping its investment in drones over the next nine years, according to Pentagon plans. Medium and high altitude unmanned aircraft like the Global Hawk, Predator, and Reaper will balloon in number to 650 in fiscal year 2021, up from approximately 340 in fiscal year 2012. The emphasis on unmanned aircraft is a direct reflection of recent operational experience and combatant commander (COCOM) demand," the aviation plan states. And what does that refer to? Just a few examples: There were 118 drone strikes in the ... Pakistan-Afghanistan border region of North and South Waziristan in 2010, up drastically from about 50 in 2009. Every day these systems are being flown by the U.S. worldwide. An advantage to using drones is the persistent surveillance they provide, having the ability to hover over a target for hours on end. National security expert John Pike likens it to an FBI stakeout of a gangster's social club. And another obvious benefit-- using unmanned drones allows the military and the CIA to avoid US casualties. "You avoid body bags, hostages, and public attention," says Pike. The procurement plan numbers released only focus on the larger, higher speed unmanned aircraft, and leave out the smaller systems the US has and plans to purchase. In total, the US currently has 8,000 drones of all sizes and capabilities.