president biden laid a wreath at the tomb of the unknown soldier at arlington national cemetery, the first time in two decades when the country hasn't been at war. he praised the nation's veterans as the spine of america. mr. biden's late son beau served in iraq. president biden is stepping up treatment for veterans who have toxins from burn pits. transitioning into the civilian workforce, for some ptsd and injuries sustained during their service make it extremely difficult but one group in georgia wants to honor our heroes by helping them and teaching them new skills. >> oh, my gosh! >> reporter: army veteran marykatharine gorlich says right here on the golf course is where she feels at home. what do you think is therapy ability golf? >> you can be broken and still play. >> reporter: broken physically and mentally from eight years in the army. >> it doesn't look like anything is wrong, per se, it's invisible disabilities people don't understand. >> reporter: invisible disabilities. >> absolutely. >> reporter: something not always understood in the civilian world, but at operation do

. >> o'donnell: today, he's one of thousands honoring the nation's fallen at arlington national cemetery. what went through your mind when you laid down a flower at the tomb of the unknown today? >> it was an honor. >> o'donnell: was it emotional for you? >> it won't hit me until i get home. >> o'donnell: for two days, americans came in uniform, brought their families. some saluted, others hand over their hearts, and there was quiet... ( bells toll ) ...except for the hourly chiming of bells. ♪ ( "taps" ) ...and the occasional playing of "taps." thousands of flowers placed as a thank you, and when the pile got too high, service members made room for more. "i came with my parents. my father served in the army for 30 years. an honor to lay flowers at a memorial created 100 years ago to commemorate americans who died in war and their bodies never identified." >> i kept thanking god that he was safe. >> reporter: bush was able to come home to the love of his life, dorothy. now his wife of 78 years. how do you give back? >> i think you treat other people the way you'd like to be treated. ev

president biden today laid a wreath at the tomb of the unknown soldier at arlington national cemetery. it's the first time in two decades when the country hasn't been at war. later, he praised the nation's veterans as "the spine of america." mr. biden's late son beau served in iraq. the biden administration is stepping up efforts to treat medical conditions suffered by troops exposed to toxins from burn pits. we wanted to look at one of the most pressing issues veterans face when they leave the military-- that's transitioning into the civilian workforce. for some, p.t.s.d. and injuries sustained during their service make it extremely difficult. but, one group in georgia wants to honor our heroes by helping them and teaching them new skills. >> oh, my gosh! bombed it! >> reporter: army veteran marykatharine gorlich says, right here on the golf course is where she feels at home. the go what is it about golf that you think is therapy? >> you can be broken and still play. ( laughs ) >> reporter: broken physically and mentally from eight years in the army. >> it doesn't look like anything