NBC Nightly News with Brian Williams
TONIGHT: The brigade of comfort dogs that have arrived in Boston to help comfort the city

TONIGHT: The brigade of comfort dogs that have arrived in Boston to help comfort the city

Superhero window washers cheering up hospitalized kids. Our Making a Difference report tonight on NBC Nightly News.

Superhero window washers cheering up hospitalized kids. Our Making a Difference report tonight on NBC Nightly News.

The photo that has captured everyone’s attention today: Tourist photographs NYPD officer giving a new pair of boots to barefooted homeless man in Times Square. Story: http://nbcnews.to/QsTFdUPhoto: Jennifer Foster

The photo that has captured everyone’s attention today: Tourist photographs NYPD officer giving a new pair of boots to barefooted homeless man in Times Square. 

Story: http://nbcnews.to/QsTFdU

Photo: Jennifer Foster

Two women were rescued by passers-by from a burning car in Missisippi following an accident yesterday. Photos/StoryPhoto: Gerald Herbert/AP

Two women were rescued by passers-by from a burning car in Missisippi following an accident yesterday. Photos/Story

Photo: Gerald Herbert/AP

Tonight on Nightly News: An unbelievable story of generosity in Clark County, Kentucky where a man learned that his local Kmart was closing and decided to take his hard earned money and buy everything that remained on the store’s shelves and give it all away.

Tonight on Nightly News: An unbelievable story of generosity in Clark County, Kentucky where a man learned that his local Kmart was closing and decided to take his hard earned money and buy everything that remained on the store’s shelves and give it all away.

Who’s a good dog? Chelsea Clinton has tonight’s Making A Difference report on Vets Helping Heroes, an organization that provides service dogs to veterans.