system. we'll be closely tracking this storm this weekend. and be sure to tune in to "american voices" saturdays and sundays at 6:00 p.m. eastern. tomorrow we'll be joined by julian castro. that's our broadcast for this friday night. with our thanks to you for being with us, on behalf of my colleagues at the networks of nbc news, good night. on in the world tonight we are tracking what could be a very, very dangerous hurricane that appears to be aimed at new orleans on the gulf coast. with potential landfall this weekend on sunday. and yes, you are remembering correctly that that would be 16 years exactly since the devastation of hurricane katrina, in that exact part of the country.