. >> reporter: nathan norman is a lively 6-year-old boy with a deadly type of brain cancer and so lasttember his mother dawn asked what he might want for christmas in advance just in case, and what he wanted was a few cards from police or firemen. >> why was he asking? for christmas cards from police and firefighters? >> he's 100%. to him, police firemen, military that's his heroes. >> what happened next was his wish around the world. nathan's request went viral on the internet with viral being an understatement. police, fire and military units did not just send cards. hundreds of officers every week are showing up at his lynchburg, virginia, home in person. they want to meet nathan, put their arms around nathan be arrested by nathan. the border patrol brought their drug-sniffing dogs. the secret service brought their bomb detection robots. 250 state troopers drove from new england to salute nathan in formation. the family still gets cards, uniformsing s uniforms, combat yards. and they tell him he is their hero for the battle he is waging. here's a boy who could have asked go to disne