. >> reporter: it wasn't so long ago bruce james was living the life he always planned. >> aerospaceas my career. i worked on the space station and lab. >> it changed in an instant in 2008. >> potential customer was schizophrenic. he heard voices. he came in and opened fire on me and my co-worker. my like a dummy popped up to like and caught a .45 in the temple. i lost my eye. i have a titanium plate in my head to cover up the hole in my skull. >> reporter: the surgery saved has life, but bruce lost his job and pride. frustrated by the bureaucracy, he never could get social security, and his outlook on life faded with his sight. >> finding myself not being able to work was different for me. it was difficult. i had no where to go after that. i was homeless. >> reporter: bruce became a part of growing subculture of destitute people on the rise in cities across the country. it's a condition knowing as chronically homeless. >> the definition is that you have serious mental or physical disabilities, and you have been literally homeless, sleeping on the street, and third, you have to be do