US, China, India, UK, Iran, Pakistan, Israel, Russia, and North Korea are all key players on the cyber battlefield, a new type of warfare set to go hand-in-hand with conventional combat.
The 1983 movie WarGames was about a seemingly harmless high school student who was able to hack into a military computer mainframe, which was wired for command and control of America's nuclear arsenal, for only one reason -- to play some online games.
At the time of its release, it seemed ludicrous that anyone could use a telephone to take control of anything connected to computers, much less ICBM silos (most of the US's nuclear warheads have since been placed on submarines, making it impossible to gain control through hacking).
Fast-forward 30 years, and that notion is no longer the case, as not only can world governments deliver collateral damage or cause disruption over an Internet connection, but they can do so with little to no cost, and without using conventional weapons.
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