from palo alto, hank greely, director center for the law and biosciences in stanford.lluck, who wrote the story for the "new york times." this is a remarkable story, a remarkable advance. we want to fully understand the potential and some of the caution being raised. i begin with pam belluck here. tell me the significance of this. >> so this is really a big deal. this is the closest that we have come to being able to genetically modify a human embryo. it was quite a successful experiment, or series of experiments, that the team did. that tells you that the ability to do that safely and to do that successfully is probably not all that far off. a number of years for sure, maybe a decade, but it's not all that far off. >> charlie: people with diseases that could be inherited, that issue can be eliminated? >> right. i mean, the goal is to be able to -- for couples who have mutations that they would pass on to their children, that would be a specific cause of a disease, the idea is that you would be able to correct this, to repair the mutation, to basically get rid of it. a

deploying more interceptor whether at the existing facility in fort greely, alaska, or at a new installation would add capacity and enable our defenses to better handle icbm threats. there are also advanced technology programs such as the development of lasers mounted on unmanned systems, which hold significant promise for future missile defense. the missile defense agency is pursuing these options, but the question remains, are our current efforts enough? to help answer this question, the administration is conducting a review of ballistic missile threats and our missile defense posture. the first of its kind since 2010. there is no doubt that the threat environment of today is far more sophisticated and challenging than it was during the last review. our missile defense posture has remained largely unchanged since 2013. on responding to north korean missile developments, then-secretary of defense chuck hagel announced the obama administration's decision to increase the number of deployed interceptor from 30 to 44. the final deployment of these interceptors is expected by the end of this yea