FILE - This March 12, 2016 file photo shows Sandi Morris exulting as she clears the winning height in the women's pole vault at the U.S. indoor track and field championships in Portland, Ore. Surpassing the 16-foot mark has the American pole vaulter readjusting her goals. The next step in her progression? A world championship and even the world record. She'll get a shot at her new target on Thursday, March 17, 2016 when the IAAF world indoor track and field championships open in Portland, Oregon, with the pole vault competition. (Andy Nelson/The Register-Guard via AP, file)