Misc: What tropical root is used to flavor soft drinks?

Questions

60s: Discovered in 1967, pulsating radio sources in space are better known as this?

60s: First nation ever to resign from the united nations.?

60s: Theodore Maiman demonstrated this enlightening device for the first time in '60?

60s: This bridge, the largest suspension bridge in the US, was finished in 1964.?

70s: Angola won its independence fromthem in 1975.?