"Chompie" returns. It had last appeared in 2006 and 2010. According to http://www.bethesdamagazine.com/Bethesda-Beat/2015/Discovery-Asks-For-Help-Deciding-Shark-Week-Design-for-Silver-Spring-Headquarters/
“Chompie,” the giant inflatable shark that sometimes is attached to the building, was last used during Shark Week in 2012. It was the event’s 25th anniversary.
The shark, which also appeared in 2006 and 2010, was made of 11,720 yards of fabric, almost seven miles’ worth. A shark head was attached to one side of the building, while two side fins, a dorsal fin and tail were attached to the other sides of the building and its roof.
It took 10 air blowers blowing 2,000 cubic feet of air per minute to keep the five pieces inflated, which had to be installed with a crane and tied down with cables and ropes.