starting with you, anthony banbury, how practical how hopeful is that? well we're all hoping that we're going to have a vaccine, improved treatments so fewer people die who do contract it but in terms of the current operation and what we're doing day to day, we can't rely on the arrival of a vaccine or improved treatment. we have to deal with the realities that are on the ground now, the tools that we have at our disposal. and they're what senator coons said-- they're the treatment centers that do isolation they're the safe burial practices, social mobilization. we have to break the transmission. and that's working. where we've put those response capabilities in place we see dramatic drops in the numbers. the challenge will be to have that capability across these three countries that have really poor roads. they're very isolated villages. sometimes they take two days, three days to drive to. so we have a challenge on our hand but we know what we need to do. >> ifill: well as you talk about the improvement on the ground, senator coons, how much of that is

talk about what comes next with two officials just back from west africa: the united nations' anthony banbury and delaware senator chris coons. good evening, i'm gwen ifill. >> woodruff: and i'm judy woodruff. also ahead this tuesday: mexico's president visits the white house amidst allegations of corruption and police abuses. >> ifill: plus: how peru is using the latest drone technology to protect the country's archaeological heritage from encroaching development. >> these are only tools, means to an end.

talk about what comes next with two officials just back from west africa: the united nations' anthony banbury and delaware senator chris coons. good evening, i'm gwen ifill. >> woodruff: and i'm judy woodruff. also ahead this tuesday: mexico's president visits the white house amidst allegations of corruption and police abuses. >> ifill: plus: how peru is using the latest drone technology to protect the country's archaeological heritage from encroaching development. >> these are only tools, means to an end.