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A patient is injected with a 5.0 M solution of gallium citrate containing radioactive gallium-68 for a PET study. The half-life of gallium-68 is 9.4 hr. How long does it take for the activity of this isotope to drop to 1% of its initial value?
William Calley
An officer in the United States Army who was found guilty of murdering 22 unarmed South Vietnamese civilians in the My Lai Massacre during the Vietnam War.
Army Lieutenant
A rank in various military forces, typically positioned above second lieutenant and below captain, often responsible for leading small military units.
Assassination Attempt
A failed or thwarted effort to kill a public figure or leader, often motivated by political, personal, or ideological reasons.
George Wallace
George Wallace was an American politician and four-time governor of Alabama, best known for his pro-segregation attitudes during the Civil Rights Movement and his attempt to block the desegregation of the University of Alabama in 1963.
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