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:
List of closed New York City Subway stations
Table title:
For reconstruction
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Station </th><th colspan=1 rowspan=1 > Division </th><th colspan=1 rowspan=1 > Line </th><th colspan=1 rowspan=1 > Borough </th><th colspan=1 rowspan=1 > Closed </th><th colspan=1 rowspan=1 > Reopened </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > Cortlandt Street </td><td colspan=1 rowspan=2 > B (BMT) </td><td colspan=1 rowspan=2 > Broadway Line </td><td class="highlighted"  colspan=1 rowspan=2 > Manhattan </td><td class="highlighted"  colspan=1 rowspan=1 > September 11, 2001 </td><td colspan=1 rowspan=1 > September 15, 2002 </td><td class="highlighted"  colspan=1 rowspan=1 > Closed when station sustained significant damage due to the September 11, 2001 attacks. </td></tr>
<tr> <td colspan=1 rowspan=1 > August 20, 2005 </td><td colspan=1 rowspan=1 > November 25, 2009 (northbound) September 6, 2011 (southbound) </td><td colspan=1 rowspan=1 > Closed a second time for the construction of the Dey Street Passageway and by request of the Port Authority of New York and New Jersey to facilitate the rebuilding of the World Trade Center site. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Cortlandt Street </td><td colspan=1 rowspan=1 > A (IRT) </td><td colspan=1 rowspan=1 > Broadway–Seventh Avenue Line </td><td class="highlighted"  colspan=1 rowspan=1 > Manhattan </td><td class="highlighted"  colspan=1 rowspan=1 > September 11, 2001 </td><td colspan=1 rowspan=1 > September 8, 2018 </td><td class="highlighted"  colspan=1 rowspan=1 > Closed when station sustained severe damage due to it being right underneath Ground Zero of the September 11, 2001 attacks. Station has since been rebuilt while reconstruction of the new World Trade Center site is being performed. </td></tr>
<tr> <td colspan=1 rowspan=1 > Intervale Avenue </td><td colspan=1 rowspan=1 > A (IRT) </td><td colspan=1 rowspan=1 > White Plains Road Line </td><td colspan=1 rowspan=1 > Bronx </td><td colspan=1 rowspan=1 > March 15, 1989 </td><td colspan=1 rowspan=1 > April 21, 1992 </td><td colspan=1 rowspan=1 > Closed due to station house arson in 1989, reopened after extensive reconstruction. </td></tr>
<tr> <td colspan=1 rowspan=1 > South Ferry (new) </td><td colspan=1 rowspan=1 > A (IRT) </td><td colspan=1 rowspan=1 > Broadway – Seventh Avenue Line </td><td colspan=1 rowspan=1 > Manhattan </td><td colspan=1 rowspan=1 > October 28, 2012 </td><td colspan=1 rowspan=1 > June 27, 2017 </td><td colspan=1 rowspan=1 > Flooded during Hurricane Sandy in October 2012. The outer South Ferry loop served as a temporary replacement while the new station was being rebuilt. </td></tr>
</table>
Question:
What date did the Cortlandt Street station close in Manhattan, and what was the cause of the closure?
Answer:
Cortlandt Street stations were closed in Manhattan in the aftermath of the September 11, 2001 attacks.