After an incident during <a href="https://en.wikipedia.org/wiki/STS-114" id="mwAU4" rel="mw:WikiLink" title="STS-114">STS-114</a>, <a href="https://en.wikipedia.org/wiki/NASA" id="mwAU8" rel="mw:WikiLink" title="NASA">NASA</a> grounds the <a href="https://en.wikipedia.org/wiki/Space_Shuttle" id="mwAVA" rel="mw:WikiLink" title="Space Shuttle">Space Shuttle</a>, pending an investigation of the continuing problem with the shedding of foam insulation from the <a href="https://en.wikipedia.org/wiki/Space_Shuttle_external_tank" id="mwAVE" rel="mw:WikiLink" title="Space Shuttle external tank">external fuel tank</a>.