Well, it's not my best Northern Rough-winged Swallow picture, but it's one of the few times I've photographed them bringing food to a nest (with nestlings). Although it's hard to tell, this adult is carrying insects in its bill.
This photograph is from 15 July 2016. This appears to be a relatively late date for Northern Rough-winged Swallows to be feeding young in this region. (Perhaps their first brood failed, so they're trying a second time?)
Three years ago, I photographed fledglings much earlier — see the post from 21 June 2013.
And to see some nice photographs of adult Northern Rough-winged Swallows, review the post from 2 May 2013.