we'll talk with matt gallagher about how much worse things could get or if the worst is behind us. we're back in a moment and 5g maps that are mostly gaps— they're switching to t-mobile for business and getting more 5g bars in more places. save over $1,000 when you switch to our ultimate business plan... ...for the lowest price ever. plus, choose from the latest 5g smartphones— like a free samsung galaxy s22. so switch to the network that helps your business do more for less—join the big switch to t-mobile for business today. flexshares etfs are built with advanced modeling. to fill portfolio gaps and target specific goals. strengthening client confidence in you. before investing consider the fund's investment objectives, risks, charges and expenses. go to flexshares.com for a prospectus containing this information. read it carefully. >>> welcome back, everybody. just want to show you the ten-year yield which just a moment ago crossed above the highest level since may of 2019. a three-year high and a significant move going back to last week. this one triggered by comments from fed

>> reporter: matt gallagher served in iraq. adrian barn berger did too, in afghanistan. another group of volunteers. he served two tours in iraq as a marine. >> there's suspected patrol in the area, we're not sure. any questions? >> reporter: ben, matt, and adrian are not working for the u.s. military or government. they're not being paid by anyone. they bought their own tickets here and are doing this for free. why did you want to be here? >> i came to this country for the first time in 2015. i fell in love with the country. i met my wife here. so it was a personal connection. >> and our personal connection was to him and to the overall effort of a democracy fighting to be a democracy. >> i kind of landed on an old line from "for whom the bell tolls." "for what are we born if not to aid one another?" looking at my two young sons and thinking of that line, i felt this was a unique opportunity to help show them how to be the men, the grown-up aadults i aspire for them to be. >> reporter: two weeks ago, the volunteers they train had no idea how to clear a building or move

>> reporter: matt gallagher served in iraq. adrian did two tours in afghanistan.d. >> okay, thanks. >> think about where you were two weeks ago. >> reporter: outside, ben bush prepares another group of volunteers. he served two tours in iraq as a marine. >> there is a suspected patrol in the area of one or two people. we're not sure. squad leader, are there any questions? >> reporter: ben, matt and adrian are not working for the u.s. military or government. they're not being paid by anyone. they bought their own tickets here and are doing this for free. what made you want to do this? >> i came to this country for the first time in 2015. i fell in love with the country. i met my wife here. so it was personal connection. >> and our personal connection was to him and to the overall effort of a democracy fighting to be a democracy. >> i kind of landed on an old line from "for whom the bell tolls" what are we born but to aid one another. looking at any son and that line, i felt like this was a unique opportunity to help show them how to be the men, grown-up adults i as