From Nikon's Youtube Channel:
"If you're a pro photographer, you need a support service that gives you fast and efficient repairs. Nikon Professional Services (NPS) Service Technician, Kodai Matsumoto, demonstrates just how quickly he can diagnose and repair a Nikon D4 - shot on location at the FINA World Swimming Championships, BCN2013, in Barcelona. NPS provides support services like check and clean, running repairs and equipment loans to accredited Nikon photographers at major events like BCN2013."
Adorama carries the Nikon D4 DSLR Camera.