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life still exists on mars? and the other part of that equation, rob, is this is the last of the grelast exploration missions on the books for nasa. it could jump-start the ability to get more missions on the books, spend more money. fit goes wro if it goes wrong, this could be the end of mars exploration. >> whether is this goin is this? visually, what are we going to be able to see if anything at all? >> sunday morning -- it will be 1:30 in the morning monday morning pacific time it's 10:30 p.m. sunday night. and you'll watch it right here on cnn. we'll be carrying it live across al...

it isn't known yet whether he tested positive, the remaining prisoners are being handcuffed to their beds. fighting is continuing in aleppo. cnn turk was able to enter an area under fire and capture this video. today rebels stormed the state-run tv and radio station and took partial control of the building but eventually had to retreat under heavy shelling. in the midst of the shooting, check out this video that is a non-violent protest against bashar al assad. it reportedly happened yesterday. cnn can't confirm the authenticity of this video. 56 people have died in fighting today....

>> reporter: between now and november, slim to none. i can probably predict it could get worse in terms of polarization here. the big question will be what happens after november in the so-called lame duck session which will be long and very important. that's going to depend on what happens in november. that's really going to decide what happens with some of these big issues especially the one i mentioned. >> you'll be so busy following the election either way. dana bash from the hill. thanks for that. it's mitt romney versus h r harry reid. the senate majority leader said an unnam...