Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Michael Norman (sprinter)
Table title:
National Competition Record
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Competition </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Time </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <th colspan=7 rowspan=1 > Unattached </th></tr>
<tr> <td colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > USA Junior Championships </td><td colspan=1 rowspan=1 > Eugene, Oregon (Hayward Field) </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 20.24 </td><td colspan=1 rowspan=1 > PB </td></tr>
<tr> <td colspan=1 rowspan=3 > 2016 </td><td colspan=1 rowspan=1 > USA Junior Championships </td><td colspan=1 rowspan=1 > Clovis, California (Veterans Memorial Stadium) </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 20.15 </td><td colspan=1 rowspan=1 > CR, PB </td></tr>
<tr> <td colspan=1 rowspan=2 > U.S. Olympic Trials </td><td colspan=1 rowspan=2 > Eugene, Oregon (Hayward Field) </td><td colspan=1 rowspan=1 > 20th </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 46.21 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 5th </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 20.14 </td><td colspan=1 rowspan=1 > PB </td></tr>
<tr> <th colspan=7 rowspan=1 > Representing the USC Trojans </th></tr>
<tr> <td colspan=1 rowspan=3 > 2017 </td><td colspan=1 rowspan=2 > NCAA Division I Championships </td><td colspan=1 rowspan=2 > Eugene, Oregon (Hayward Field) </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 44.88 </td><td colspan=1 rowspan=1 > PB </td></tr>
<tr> <td colspan=1 rowspan=1 > 13th </td><td colspan=1 rowspan=1 > 4×400 m relay </td><td colspan=1 rowspan=1 > 3:05.80 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > USA Championships </td><td colspan=1 rowspan=1 > Sacramento, California (Hornet Stadium) </td><td colspan=1 rowspan=1 > 7th </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 44.80 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=5 > 2018 </td><td colspan=1 rowspan=2 > NCAA Division I Indoor Championships </td><td colspan=1 rowspan=2 > College Station, Texas (Gilliam Indoor Track Stadium) </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 44.52 </td><td colspan=1 rowspan=1 > WR, CR, NCAAR, FR, PB </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 4×400 m relay </td><td colspan=1 rowspan=1 > 3:00.77 </td><td colspan=1 rowspan=1 > WB, CR, NCAAR, FR, SB </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > NCAA Division I Championships </td><td colspan=1 rowspan=2 > Eugene, Oregon (Hayward Field) </td><td colspan=1 rowspan=1 > 1st </td><td class="highlighted"  colspan=1 rowspan=1 > 400 m </td><td class="highlighted"  colspan=1 rowspan=1 > 43.61 </td><td class="highlighted"  colspan=1 rowspan=1 > WL, CR, NCAAR, FR, PB </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 4×400 m relay </td><td colspan=1 rowspan=1 > 2:59.00 </td><td colspan=1 rowspan=1 > CR, NCAAR, FR, SB </td></tr>
<tr> <td colspan=1 rowspan=1 > USA Championships </td><td colspan=1 rowspan=1 > Des Moines, Iowa (Drake Stadium) </td><td colspan=1 rowspan=1 > 8th </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 20.35 </td><td colspan=1 rowspan=1 > Q </td></tr>
</table>
Question:
At the 2018 NCAA Division I Championships, what time did Michael Norman achieve in the 400m event?
Answer:
Norman ran a 2018 World Leading time in the 400 meters with a time of 43.61 seconds at the NCAA Division I Championships.