He worked on one per week for thirteen weeks, then started over, four times a year.

FORBES: Level 5 Time Management: Beyond Stephen R. Covey and Ben Franklin

This holiday shortened thirteen trading week of 2013 comes to a close with investors sending stocks higher.

FORBES: Weekly Wrap

In a University of California survey, students reported spending thirteen hours a week on schoolwork and forty-three hours socializing and pursuing various forms of entertainment.

NEWYORKER: Live and Learn

Thirteen years ago this week, a pitched battle erupted in Mogadishu that led to the deaths of 18 American servicemen.

CENTERFORSECURITYPOLICY: An African Taliban

Major LUKE KNITTIG (ISAF): This week, five ISAF soldiers have been killed and thirteen wounded fighting for the future of Afghanistan.

NPR: Afghan Violence Shows Little Sign of Easing

Thirteen U.S. soldiers have been killed in the past week alone.

NPR: U.N. Chief in Iraq Sees Limited Progress

This week, t he Department of Justice announced the arrest of Wilbur Huff, 51, on thirteen counts related to Park Avenue Bank.

FORBES: Investigation Into Bank Bailout Fraud Leads to Tax Charges