Misc: What is the fear of being enclosed known as?

Questions

Battle of France begins in WW II.?

First synthetic rubber tire exhibited Akron, OH.?

First B-29 bombing raid one plane lost; engine failure.?

Israel, Syria, Jordan, Iraq, and Egypt begin Six-Day War.?

Sen. Robert F. Kennedy assassinated at the Ambassador Hotel in Los Angeles (by Sirhan Sirhan) after winning the Democratic Primary.?