FOX NEWS

From Cape Canaveral, Florida, Apollo 16, the fifth of six U.S.
lunar landing missions,was successfully launched (above)
on its 238,000-mile journey to the moon.

The prime crew of the Apollo 16 lunar landing mission. From
left to right: Thomas K. Mattingly II, Command Module pilot; John W. Young, Commander; and Charles M. Duke Jr., Lunar Module pilot.

     
      DAVID MELENDY

    
Seung-Hui Cho, the student gunman.

Injured occupants are carried out of Norris Hall at Virginia
Tech.

The Boston Marathon bombing, sometimes referred to as just
simply the Boston bombing, was a domestic terrorist attack
that took place during the annual Boston Marathon on April
15, 2013. Brothers Dzhokhar and Tamerlan Tsarnaev planted
two homemade pressure cooker bombs that detonated near
the finish line of the race 14 seconds and 210 yards (190 m)
apart. Three people were killed and hundreds injured, including
17 who lost limbs.

Spectators helping victims soon after the attack.

Undated file photos show Boston Marathon bombing
suspects Tamerlan Tsarnaev, left, and Dzhokhar
Tsarnaev. (AP) 

President Abraham Lincoln died in Washington, D.C., on this
day in history, April 15, 1865, one day after he was shot by
actor John Wilkes Booth. He was 56.

Lincoln, who was elected president in 1860, was the first U.S.
president to be assassinated. 

This engraving depicts John Wilkes Booth escaping after shooting President Lincoln at Ford’s Theatre. 

The Lincoln Memorial on the National Mall and is dedicated
to the memory of President Abraham Lincoln.