Marine Corps Marathon

Security is now top priority.

Technical issues and glitches plague the race Web site during registration.

Cold weather, hills present numerous challenges to the field.

Active duty and reservists can receive 15 percent off entry.

Website, Facebook, Twitter, App & Text Messaging generates 11 million potential impressions.

A record 23,454 finishers participated in the race.

The Olympic bronze medalist joins actor Rob Riggle.

Over three-thousand children will take part.

Check out Duncan Larkin's author page.

Company connects athletes and events with eco-friendly goals.

Registration opens for it March 7.

Fairfax, Virginia's Lynbrook Elementary won $1000.