Event:
U.S. Army tests 1st machine gun mounted on a plane
More Notable Events on June 7:
1993 Cleveland breaks ground for Rock and Roll Hall of Fame
1982 President Reagan meets Pope John Paul II and Queen Elizabeth
1981 Israeli F-15's and F-16's destroys Iraqi plutonium production facility
1929 Vatican City becomes a sovereign state
1864 Abe Lincoln renominated for President by Republican Party
