The GSA is responsible for gatekeeping federal resources, making the now infamous clown-conference scandal all the more embarrassing.

FORBES: Why Federal Agencies Should Hire Magicians (But Not Clowns or Mind Readers)

As a lawyer and now as Chief Justice, Roberts has always supported legal doctrines that serve a gatekeeping function.

NEWYORKER: No More Mr. Nice Guy

After all, "it's not just gatekeeping, it's identity, " according to John Prendergast, the director of product management at Veritel.

CNN: Comdex: With biometrics, you're the password

Such gatekeeping depends on being able to keep the energy of the electrons dancing around inside the device at specific levels.

ECONOMIST: Babbage’s last laugh | The

These models grow from a collision of two fundamental trends: First, the general devaluation of media content, and second, a power shift in gatekeeping.

ENGADGET: Editorial: Legal torrent sites are innovators of media consumption

These indemnification agreements throw liability for due-diligence failures back on to the company issuing the shares or bonds, making a nonsense of an underwriter's gatekeeping role.

ECONOMIST: Face value

At the time, in journalism schools and conferences, the villain of new media was Matt Drudge, the Genghis Khan of the Internet, burning the gates and the power of gatekeeping.

FORBES: Medialand

On the other hand, mothers who engaged in negative gatekeeping, grimacing or criticized fathers' efforts to take charge, could block out even fathers who believe they should be involved, says the study, led by Sarah Schoppe-Sullivan, assistant professor, child development, at Ohio State University.

WSJ: Managing Your Re-Entry to the Work Force After Child Rearing