inaudible davide sher, we are hoping to be able to hear you.i'm sorry! can you hear me? you froze very few seconds. we hope the line remains intact because we wa nt the line remains intact because we want to hear what you have to say. could you just explain why you think 3d printing is so important? hospitals could print the ventilators they could desperately need, is that what we're looking at? absolutely. i hope i made point before. the benefit of 3d printing is it can step in when the supply chains are broken. when things cannot get through place to another. what happened recently in a hospital was that there was a key component for a respirator that was broken and the company could not produce more. in this case they were able to reproduce the peace and —— piece... inaudible ...and inaudible and use it to help save patients' lives. so you just need the correct blueprints for the item you need to replicate? that is the essential fact, isn't it? exactly. what happened in this case was the pa rt happened in this case was the part that ran out

david clooney, the executive director of it black economic alliance and sher michael singleton. nbc's mike memily. how are things feeling at the biden headquarters? >> you can certainly see it and hear it in those clips you just played. the fact we were supposed to be in cleveland today, had to shift locations because of the coronavirus, allowed some of those biden campaign staffers usually stuck in headquarters on a night like this actually be and celebrate with their boss. you can hear the applause from them. from biden himself you actually saw a different -- from candidate to potential nominee here at this point definitely trying to strike a different tone. when the week started, ali, the bideb campaign team were saying if the sanders team thinks the democratic primary electorate voters writ large have the appetite for a long drawn out bitter fight until the convention, they risk misreading the mood of the electorate. and when they see the results tonight, then of course that biggest delegate prize in michigan they certainly feel validated and the campaign thinks they're pote