Spies have always lived among us. (There are even spies in the Bible – most famously Caleb, sent by Moses to report back surreptitiously from Canaan.) By definition, they have the ability to fly under ...
ANSWER: Spying goes back to Biblical times. Joshua sent two spies into Jericho before conquering Canaan. Military strategist Sun Tsu wrote about spying in his “The Art of War” treatise way back in 500 ...