(CNN)She's been training this dangerous jump for years. And finally, under the bask of Olympic lights, Mirai Nagasu did something no other American woman has ever done at the Olympics:
The insanely difficult feat of the triple axel, broken down
She landed a triple axel.
Why this is so massively impressive:
The axel jump was first invented in 1882 — by a guy named Axel Paulsen. But he only did a single axel. It took more than 90 years for the first man to land a triple axel.
And it wasn't until 1991 that the first American woman landed a triple axel. That was Tonya Harding at the 1991 US championships.
At the Olympic level, Nagasu is only the third woman -- and the first American woman -- to successfully complete the triple axel; the other two are Japanese skaters Midori Ito and Mao Asada.
Why the triple axel is so rare to pull off: