The <a href="https://en.wikipedia.org/wiki/Communications_satellite" id="mw6Q" rel="mw:WikiLink" title="Communications satellite">communications satellites</a> <a href="https://en.wikipedia.org/wiki/Iridium_33" id="mw6g" rel="mw:WikiLink" title="Iridium 33">Iridium 33</a> and <a href="https://en.wikipedia.org/wiki/Kosmos_2251" id="mw6w" rel="mw:WikiLink" title="Kosmos 2251">Kosmos 2251</a> <a href="https://en.wikipedia.org/wiki/2009_satellite_collision" id="mw7A" rel="mw:WikiLink" title="2009 satellite collision">collide in orbit</a>, destroying both.