<page_title> List of X-15 flights </page_title> <section_title> List of flights </section_title> <table> <cell> 90 <col_header>  </col_header> <col_header> FF </col_header> </cell> <cell> Walker <col_header>  </col_header> <col_header> Pilot </col_header> </cell> <cell> 347,800 <col_header>  </col_header> <col_header> MA </col_header> </cell> <cell> FAI spaceflight. Second highest altitude of program. <col_header>  </col_header> <col_header> Notes </col_header> </cell> <cell> 91 <col_header>  </col_header> <col_header> FF </col_header> </cell> <cell> Walker <col_header>  </col_header> <col_header> Pilot </col_header> </cell> <cell> 354,200 <col_header>  </col_header> <col_header> MA </col_header> </cell> <cell> FAI spaceflight. Walker's last free flight. Highest altitude of program. <col_header>  </col_header> <col_header> Notes </col_header> </cell> </table>
Joseph Walker set the program's top two altitude records on its 90th and 91st free flights (347,800 and 354,200 feet, respectively).