"Life In Glass Domes At First": Elon Musk On First Mars Settlement

While responding to a Twitterati's query on accommodating people at Mars, SpaceX CEO Elon Musk has stated that the first human population would settle in glass domes. Musk wrote, "Life in glass domes at first. Eventually, terraformed to support life, like Earth", thus altering the alien atmosphere to make it habitable.  However, NASA claimed that technology to terraform Mars would not be possible anytime soon with the available technologies.