Katelynne Hart of Glenbard West, Ill. turned heads this weekend with her 10:21.41 two mile, a US #1 mark this season and a new national freshman class record. The prior ninth grade indoor record was 10:23.46, set back in 1998 by Michelle dela Vina. Who is this phenom, and what will she do next? Jojo investigates.<br />http://bit.ly/2kUGbbT<br /><br />Visit MileSplit.com: http://milesplit.com<br /><br />Subscribe to MileSplit.com: http://bit.ly/2j1nk1D<br /><br />Watch MileSplit events: http://bit.ly/2icwtAr<br /><br />Like us on Facebook: https://www.facebook.com/MileSplit<br /><br />Follow us on Twitter: https://twitter.com/milesplit<br /><br />Follow us on Instagram: https://www.instagram.com/milesplit/