secretaries of health and human services, who oversaw the programs: kathleen sebelius who served under president obama until last year. and drs sullivan who served under president george h. w. bush. welcome, secretary sullivan secretary sebelius and secretary sebelius let me start with you. what difference have medicare and medicaid made in this country? >> well, i think those made an incredible difference in the lives of about 120 million americans and couldn'ting. so seniors were the poorest group of americans when medicare was passed 50 years ago. they were going bankrupt because of medical bills they couldn't afford the care they needed. and to have that guarantee once you turn 65 or so disabled that you qualify early that you have a set of benefits. and you don't have to be qualified by health you qualified by age has made a huge difference in this country. >> woodruff: and secretary sullivan, what about medicaid? >> medicaid has also contributed greatly to improving the health and access to health care for our citizens. for example 50% of the births in the country are paid for by medicaid. most of the care for hiv/aids