mars maven, lockheed martin, it godard space flight, instruments from all over the world, is going todress that question r and, after it does that, and itn asks primarily how an atmosphere that is today rather unbreathable co2, nice for plants but not so much for us. how it has evolved in time by reading the record of what's happened today in situ through various experiments, mass spectometer.oday and then looking back into time of how it might have gotten to this state. what that might have informed us about mars and link it to earth. the mission was selected on the competitively on the basis of its science and engineering. that's how we do things in science.basc it's kind of like the s.t.e.m. olympics.s. you get to send a mission to mars, if you're real good, and you get a lot of -- whatever the judges score now, but good stuff.s tle this is curiosity taking a little selfie. maven will do that. already we know from curiosity measurements with the sam team that the record of this criticat ratio that tells you about escape rates for atmosphere, for mars versus earth, is different. thi

. >> reporter: we talked to one mother here at the godard school who came straight here after she heard that a teacher and one of the owners were both arrested. she says her two children won't be back. police say teacher teresa brown bit a 13-month-old boy after he bit another teacher. brown is charged with assault and battery. this is not her first time in trouble. we learned today brown was working at goddard with a criminal record, including charges of assault and stealing as recently as this year. we talked to theresa brown today about what she is accused of doing now. she didn't want to show her face, but says it's not true, and that in the past she has made mistakes, but never involving children. listen to this mother at goddard who says there is no excuse for any of this. >> this is the first time my children have ever been in daycare. and now this just really -- they just started september 1st. >> this is very heartbreaking, because now i don't know what to do. it's a trust issue. >> reporter: one of the owners of the center is also charged. police say nadia choudhry failed to r

. >> prince william county police are investigating an assault at the godard school in woodbridge. police arrested 24-year-old theresa brown who is a teacher at that school along with the owner nadia choudhry. brown is accused of biting a 13-month-old boy and is charged with assault and battery. choudhry is charged with failure to report child abuse or neglect. the incident happened september 11th. however, child protective services was only anonymously notified a day later. >> a man who used to be the treasurer for d.c. is still missing. tonight his friends' fears are growing. >> he hasn't been heard from in days but now police are weighing in on this missing persons case. >> d.c. bureau chief sam ford is live on the story for us in northeast washington. sam, what's the latest? >> well, leon, we are outside what is called the mojo house here in northeast washington where friends of lasana mac are gathering this evening to exchange information and learn what they can. neither mack nor his 2013 gray ford explorer have been seen in nine days. in his northeast d.c. neighborhood flyers