This official would be placed in the backfield opposite the referee and, according to Calhoun, would add another set of eyes to detect holding on the offensive line.

NPR: New Rule To Add Ejection For Intentional High Hit

GoalRef has been developed by German research institute Fraunhofer and involves using magnetic strips inside the ball to detect whether or not it has crossed the goal line.

CNN: FIFA awards goal-line technology licenses

You can generally detect the urgency in the e-mails by the subject line.

FORBES: 12 Tips For Increasing Productivity

When he visits the Catholic University of America in Washington, DC, on Thursday, and a New York seminary on Saturday, he will detect some ideological currents that are far removed from his hold-the-line conservatism.

ECONOMIST: Pope Benedict begins his tour