Question: In which event does the United States swimmer to win both backstroke events at the 2012 Olympics hold an individual women 's championship record ?

text: United States Short Course Swimming Championships
Championships records -- Women

The United States Short Course National Championships or USA Swimming Winter Nationals is a national championship meet organized by USA Swimming. The competition is swum short course yards (SCY), in a pool 25-yards long. The meet's most recent incarnation began in 2007, and is an held annually in November or December, on the weekend previously occupied by the U.S. Open. Prior to 1991, the annual Spring version of U.S. Nationals were swum as a 25-yard meet; however, from 1991-2007, the meet was held as a long course (50m) meet. In the mid-2000s, USA Swimming decided to revive a Nationals meet in the short-course-yards format, but decided that the meet should be in December, rather than the late-March/early April time frame that the Spring Nationals had turned into. For 2016 USA Swimming returned to the old format with two short course Nationals in one year, American Short Course Championships in March in Austin and the Winter National Championships in Atlanta in December.
Event Time Name Club Date Location
50y freestyle 21.12 Abbey Weitzeil Canyon March 5 , 2016 Austin , United States
100y freestyle 46.47 Abbey Weitzeil Canyon March 6 , 2016 Austin , United States
200y freestyle 1:41.17 Mallory Comerford Louisville Cardinals December 1 , 2017 Columbus , United States
500y freestyle 4:29.54 Katie Ledecky Nation 's Capital December 4 , 2014 Greensboro , United States
1650y freestyle 15:13.30 Katie Ledecky Nation 's Capital December 6 , 2014 Greensboro , United States
100y backstroke 50.64 Natalie Coughlin Cal Aquatics November 30 , 2007 Atlanta , Georgia , United States
200y backstroke 1:49.18 Missy Franklin Colorado Stars December 1 , 2012 Austin , United States
100y breaststroke 57.62 Alia Atkinson South Florida December 6 , 2013 Knoxville , United States
200y breaststroke 2:05.04 Laura Sogar University of Texas December 1 , 2012 Austin , United States
100y butterfly 49.87 Kelsi Worrell Louisville Cardinals December 1 , 2017 Columbus , United States
200y butterfly 1:51.02 Katinka Hosszú USC Trojans December 4 , 2010 Columbus , Ohio , United States
200y individual medley 1:52.63 Melanie Margalis Florida Swimming November 30 , 2017 Columbus , United States
400y individual medley 4:00.03 Katinka Hosszú USC Trojans December 3 , 2010 Columbus , Ohio , United States
4×50y freestyle relay 1:27.19 ( 21.88 ) Madison Kennedy ( 21.72 ) Kelsi Hall ( 22.04 ) Katie Meili ( 21.55 ) Arianna Vanderpool-Wallace SwimMAC Carolina December 5 , 2013 Knoxville , United States
4×100y freestyle relay 3:12.15 ( 49.10 ) Lainey Visscher ( 46.50 ) Mallory Comerford ( 48.23 ) Arina Openysheva ( 48.32 ) Casey Fanz Louisville Cardinals December 2 , 2017 Columbus , United States
4×200y freestyle relay 6:59.11 ( 1:42.93 ) Missy Franklin ( 1:45.33 ) Caroline Piehl ( 1:46.30 ) Camille Cheng ( 1:44.55 ) Elizabeth Pelton California Golden Bears December 6 , 2013 Knoxville , United States
4×50y medley relay 1:36.46 ( 24.57 ) Lauren Smart ( 26.79 ) Ellyn Baumgardner ( 23.67 ) Megan Lafferty ( 21.43 ) Margo Geer Arizona Wildcats November 30 , 2012 Austin , United States
4×100y medley relay 3:29.91 ( 51.27 ) Elizabeth Pelton ( 59.58 ) Marina Garcia Urzainqui ( 51.55 ) Rachel Bootsma ( 47.51 ) Missy Franklin California Golden Bears December 5 , 2013 Knoxville , United States