Elvyonn Bailey of the United States readies for the 4x400-meter relay heats at IAAF World Indoor Championships in Portland, Ore., Saturday, March 19, 2016.
Thapelo Phora of South Africa runs out of the blocks in the 4x400-meter relay at IAAF World Indoor Championships in Portland, Ore., Saturday, March 19, 2016. (Bradley W. Parks/OPB)
A runner holds the baton before the start of the 4x400-meter relay at IAAF World Indoor Championships in Portland, Ore., Saturday, March 19, 2016. (Bradley W. Parks/OPB)
Kristin Gierisch of Germany hugs her coach during the triple jump final at IAAF World Indoor Championships in Portland, Ore., Saturday, March 19, 2016. Gierisch finished second. (Bradley W. Parks/OPB)
Barbara Pierre of the United States reacts after winning her heat in the 60 meters at IAAF World Indoor Championships in Portland, Ore., Saturday, March 19, 2016. (Bradley W. Parks/OPB)
American runners Erik Sowinski, Boris Berian and Patrick Peterson round the corner in the 800 meters at USATF Indoor Championships in Portland, Ore., Saturday, March 12, 2016. (Bradley W. Parks/OPB)
American Brittney Reese bows after completing a long jump attempt at the USATF Indoor Championships in Portland, Ore., Saturday, March 12, 2016. (Bradley W. Parks/OPB)
American sprinter Calvin Smith Jr. lines up in the blocks at the USATF Indoor Championships in Portland, Ore., Saturday, March 12, 2016. (Bradley W. Parks/OPB)