April 19, 1775: At about 5 a.m., 700 British troops, on a mission
to capture Patriot leaders and seize a Patriot arsenal, march into Lexington to find 77 armed minutemen under Captain John Parker waiting for them on the town’s common green.

Suddenly, a shot was fired from an undetermined gun, and a cloud
of musket smoke soon covered the green. When the brief Battle of Lexington ended, eight Americans lay dead or dying and 10 others
were wounded.

         
British Major John Pitcairn     Captain John Parker

Einstein in 1893, age 14

   
    
   
Albert Einstein (14 March 1879 – 18 April 1955)

Einstein was a German-born theoretical physicist
who is best  known for developing the theory of
relativity.       

   
On 17 April 1955, Einstein experienced internal
bleeding caused by the rupture of an abdominal
aortic aneurysm.        

       
He died in the Princeton Hospital early the next
morning at the age of 76

On April 18, 1942, 16 American B-25 bombers, launched from
the aircraft carrier USS Hornet 650 miles east of Japan and
commanded by Lieutenant Colonel James H. Doolittle,
attacked the Japanese mainland.

The now-famous Tokyo Raid did little real damage to Japan
(wartime Premier Hideki Tojo was inspecting military bases
during the raid; one B-25 came so close, Tojo could see the
pilot, though the American bomber never fired a shot)—but
it did hurt the Japanese government’s prestige.

LT. COL. JIMMY DOOLITTLE (left) WITH TOKYO RAIDERS.