Misc: Urine was once used to?

Questions

In 1954 ---------- joins North Atlantic Treaty Organization (NATO). ?

In 1968 ---------- returns to Earth. ?

In 1973 Security Council Resol 338 - a cease fire to the ---------- War. ?

In 1975 Soviet spacecraft ---------- lands on Venus. ?

In 1979 Deposed Shah of ---------- arrived in NY for medical treatment. ?