. >> the gap began to wideen in the '90s with new ultrasound machines that made it easy to learn a fetus's sex. this scans have led to the termination of millions of female pregnancies. >> ifill: and margaret warner talks with the author of a new book about shadow wfa waged bythe c.i.a. and speal forces. >> a week after 9/11 president bush gave the c.i.a. lethal authority to capture and kill al qaeda members so they become much more into the killing business and the military. >> woodruff: that's all ahead on tonight's newshour. >> major funding for the pbs newshour has been provided by: moving our economy for 160 years. bnsf, the engine that connects us. >> and by the bill and melinda gates foundation. dedicated to the idea that all people deserve the chance to live a healthy, productive life. >> and with the ongoing support of these institutions and foundatio. and... >> this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> woodruff: new details emerged today in the investigation of two chech

. >> the gap began to wideen in the '90s with new ultrasound machines that made it easy to learn a fetus's sex. this scans have led to the termination of millions of female pregnancies. >> ifill: and margaret warner talks with the author of a new book about shadow warfare waged by the c.i.a. and special forces. >> a week after 9/11 president bush gave the c.i.a. lethal authority to capture and kill al qaeda members so they become much more into the killing business and the military. >> woodruff: that's all ahead on tonight's newshour. >> major funding for the pbs newshour has been provided by: moving our economy for 160 years. bnsf, the engine that connects us. >> and by the bill and melinda gates foundation. dedicated to the idea that all people deserve the chance to live a healthy, productive life. >> and with the ongoing support of these institutions and foundations. and... >> this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you.

. >> the gap began to wideen in the '90s with new ultrasound machines that made it easy to learn the fetus' sex. the scan led to the termination of millions of female pregnancies. in delhi, the center for social research has organized women into neighborhood groups trying to shift the ingrained gender bias, even invoking hinduism's goddess of prosperity. >> ( translated ): we must begin to welcome girl babies into our homes, like the goddess lack shi has come into our home. lack smi. >> reporter: they're also aware of the law that's become known by its english acronym. that's the pre-conception and prenatal technology act, abortion is legal in india but the act makes it illegal when done for sex selection. >> a lot of people don't even know that we have a very strong law. if you, a, go for sex selection and also the doctor, the clinic, the radiologist can go to jail up to seven years. if they're caught doing it. in the minds of people that go for sex selection. >> reporter: however, absent extensive surveillance and sting operations-- and they have been absent-- it's difficult to pol