lois a longtime friend of dr. lange. we want to thank you for being here with us. our thoughts are with you and everybody trying to reconcile what's happened. we did not know him. we want to give you a chance to help us understand the imprint that the doctor was leaving behind. what kind of man was he? what kind of visionary was he? >> yeah, visionary is a good simple word to describe him. he was very early, one of the leaders in the fight against hiv/aids, when there was nothing that could actually be done against that horrible disease, he worked tirelessly to come up with what is called a combination therapy of very dangerously hard to swallow drugs but he did not stop there being a scientist. he was, of course, very pleased that more and more people in the western world, in the united states and europe, could use