Misc: what arabian peninsula nations recently merged under communist leadership?

Questions

In 1932 Paul von ---------- elected first German president (Hitler was the second).?

In 1932 Omar ---------- , actor (Tamarind Seed, Dr. Zhivago), born.?

In 1945 Nazi concentration camp at ---------- liberated by US 80th Division.?

In 1953 House of ---------- , first feature-length 3-D movie, released in New York.?

In 1974 Yitzhak ---------- replaces resigning Prime Minister Golda Meir.?