Based on the clue 'begun in 312 bc originally 20 feet wide this firs...', what is the answer?

What is associated with: begun in 1948 this universitys african studies program was 1st of its kind in us? What is associated with: begun in 1960 the construction of this high dam on the nile cost about 1 billion? What is associated with: begun in 1967 it was the ussrs third man in space program? What is associated with: begun in 2001 an orientation program for these people tells them not to freak out over coaches… Based on the clue 'begun in 312 bc it was known in antiquity as the q...', what is the answer? Based on the clue 'begun in japan this chain of math reading centers...', what is the answer? What is associated with: begun in september 1940 the german bombing of this capital was known as the blitz? What is associated with: begun in the 2nd century bc this road of trade stretched 4000 miles from china to the mediterr…