Description:

    Sanity Check 10 ---
    Hack the ______!

Initially we noticed that there was a blank line, which suggested there was a single word answer.

Fortunately, at least one of us had seen the movie "Hackers" and recognized this challenge as a partial quotation from that movie.

An initial attempt to complete the challenge was unsuccessful, as we had submitted "planet", but referring to an old copy of The Penguin Handbook, we realized the quote was intended to be capitalized.

Answer:

    Planet