Its decadeslong mission accomplished, space shuttle Discovery is headed home to retirement after undocking from the International Space Station on Monday. On the final leg of its final journey — due to culminate with a Wednesday touchdown — Discovery performed a victory lap around the space station immediately after undocking. To ensure safe passage, the shuttle astronauts pulled out their 100-foot, laser-tipped inspection boom and checked their ship for any signs of micrometeorite damage. The safety procedure was put in place following the 2003 Columbia disaster.
'Discovery' undocks and heads home
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