this weekend on american history tv on c-span3, this evening at 6:00 eastern on the lincolnr, abraham authorities speculate on what might have been had he not been assassinated. >> we would have to assume he was going to follow a very cautious plan. and so he might not have been willing to have black codes and limited, but he certainly would've been much more conciliatory to the south. filmen it 10:00, the 1952 "round-trip: the usa in world trade." >> 10 million tons from this yard alone. an orange toom attract are going to 25% countries -- 25 different countries. >> philadelphia's carpenters hall, the meeting place of the first continental congress in 1774. >> you already ever patrick henry for his give me liberty or give me death, but even more significant was his remark made here in the earlier days when he looked around the room and he said, gentlemen, we are no longer from massachusetts. we are no longer from pennsylvania. we no longer are from virginia. we are all americans. presidency,n the ronald reagan in the transformation of global politics. >> the reagan administration was