the as ycid. they say she is 41 years old with a history of mental illness. french police stressed that this was not an act of terrorism. nevertheless, it is a horrific attack, richard, that left two american girls with severe injuries and two others in a state of shock. richard? >> all right, thank you so much, nbc's claudio loe vongo. we'll stay on top of that in terms of the conditions of the two americans and their health. during his meetings at the united nations general assembly, president trump is expected to be challenged on his decision to pull out of the paris climate accord. the white house reiterated its position in a statement yesterday, saying "the united states is withdrawing unless we can re-enter on terms that are more favorable to our country." that statement came on the heels of a "wall street journal" report suggesting the trump administration was reconsidering its position and seeking to avoid a withdrawal. french president emmanuel macron is expected to take the lead in lobbying for stronger environmental protections at the u.n. for more, i'm joined by jake