What is associated with: at the age of 70 in 1776 i was one of 3 congressional commissioners to this nation?

Based on the clue 'at the age of 13 this performer topped the country...', what is the answer? Based on the clue 'at the age of 41 she competed in her fifth olympic...', what is the answer? Based on the clue 'at the age of 58 he became the youngest man electe...', what is the answer? Based on the clue 'at the age of 61 this actor made his film debut as...', what is the answer? Based on the clue 'at the age of 9 proust had his first wheezing atta...', what is the answer? What is referred to by 'at the airport eta'? Based on the clue 'at the alamo gift shop in san antonio you can buy ...', what is the answer? What is associated with: at the american national exhibition in moscow in 1959 safire corralled these 2 politicos into…