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>> tonight, for the first time in almost 20 years, theres a new drug just approved to treat people in the early phases of alzheimers disease. >> reporter: in june, the food and drug administration green lit the first new drug approved to treat alzheimers disease since 2003. now, according to the fda, the drug can reduce alzheimers signature tangles and plaques of attorney proteins that block the neural pathways. but the approval was controversial, which many researchers, including the fdas own a...

Ago. >> now its, you know, we play russia. we dont play the soviets. theres not that, you know, rivalry between the two countries from a political end, and the professionals play now versus the amateurs, you know that we were in 1980. so i think the whole thing is very, very different from the players to just the scope of the game and what the game bhent to meant to a nation back in 1980 versus what it means today. >> wow. from 34 years ago today, but feels like just yesterday. in fact, i guess ...

>> from now on, were going to look for a brighter fuehrer. were going to look for a united community, a prosperous community, and the negativity over the last two years will go away in no time. in afghanistan today, three american service members were killed by a gunman wearing an afghan military uniform. it happened here in the unstable helmand province. we heard a few details and about a couple of attacks on coalition forces this week alone. chris lawrence is at the pentagon. chris...