How come nobody knew about this meteor in Russia? How come there was no warning? This intrigues me, our planet is under surveillance day and night and that includes the outer space surrounding us, how come everybody knew about a meteor which would fly over earth at 17000 miles but nobody knew about another meteor which would actually ENTER the atmosphere and explode at 20 miles above the surface of the most highly protected territory in the world ? Are you trying to say that the Russian space agency didn't detect this thing at least 5 years ago , while it was on its way ?