If you have to learn just one programming language

It is a very good idea to learn several programming languages. It makes you a better programmer. But if you want to devote all your energies to becoming a proficient and productive programmer and want to learn one powerful, freely available, high level general-purpose language (not domain specific), what would you choose?

For your eyes only — unless you have a telescopic lens

You may encounter a plot like this in a bad spy novel. It goes something like this:

A top ranking anti-terrorism official enters 10 Downing Street clutching a folder containing a “For your eyes only” document. He briefs the Prime Minister — about an ongoing stakeout involving potential terrorists