General Articles:
http://www.nature.com/scitable/topicpage/genetic-inequality-human-genetic-engineering-768
http://discovermagazine.com/2009/mar/02-evolution-by-intelligent-design
http://www.cbsnews.com/2100-500165_162-4840346.html
http://www.washington.edu/news/2012/11/08/extra-chromosome-21-removed-from-down-syndrome-cell-line/
http://online.wsj.com/article/SB123439771603075099.html
For Genetic Engineering:
http://www.genengnews.com/gen-articles/designing-improved-humans/2402/
Against Genetic Engineering:
Brave New World by Alexander Huxley was written in 1931, but previewed a possible world where all humans were genetically engineered. Huxley was not a scientist, but he does represent many of the fears people have of genetic engineering. This website contains chapter one of the book. http://www.huxley.net/bnw/
http://www.hgalert.org/topics/hge/threat.htm