FDA Commissioner Scott Gottlieb on Wednesday (Nov. 28) took to Twitter to condemn a Chinese researcher who made headlines after announcing he had edited the genes of a set of twin girls born this month using the CRISPR-Cas 9 gene editing tool. Gottlieb called on the scientific community to enforce “without mercy” strict standards on the use of gene editing technologies and argued that scientists should oust anyone who uses the technology to edit human embryos. Similarly, National Institutes of...