Travis Phelps, spokesman for the Washington State Department of Transportation, said a flatbed truck with an oversize load hit the upper part of the steel-lattice bridge.

WSJ: Bridge Collapse in Washington State Sends People, Vehicles Into River

In May, the company announced that it was planning unspecified new routes, and recently the passenger load reached the "upper 60% range, " says Lebron.

FORBES: No Rest For A Weary Start-Up

They need a very strong neck because every corner puts a load of around 20-25kgs on the neck, and obviously a strong upper body and forearms.

CNN: F1 drivers' hearts beat 190 times a minute in races