The top three men were all "Leathernecks."
The famous Washington D.C. race is now flatter and faster.
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.
A record 23,454 finishers participated in the race.
The Olympic bronze medalist joins actor Rob Riggle.
Over three-thousand children will take part.