STROKE!!!!!!!!!! What causes a stroke?

                                 What is a stroke? 

A stroke is a condition in which the brain cells suddenly die because of a lack of oxygen.
A stroke can be caused by an obstruction in the blood flow, or the rupture of an artery that feeds the brain.
The patient may suddenly lose the ability to speak, there may be memory problems, or one side of the body can become paralyzed.¹
This Medical News Today information article provides details on the two types of stroke, who are at risk, what its causes are, its symptoms, how a stroke is treated, and how strokes can be prevented.

The two main types of stroke

The two main types of stroke include ischemic stroke and hemorrhagic stroke.

Ischemic stroke

Ischemic stroke accounts for about 87% of all strokes and occurs when a blood clot, or thrombus forms that blocks blood flow to part of the brain.
If a blood clot forms somewhere in the body and breaks off to become free-floating, it is called an embolus. This wandering clot may be carried through the bloodstream to the brain where it can cause ischemic stroke.

Nicholas Winton -One man who changed the world

The fantastic story of Nicholas Winton who in 1939, at the outbreak of World War II, organized a rescue operation that saved the lives of 669 children. 
Sir Nicholas Winton is a humanitarian who organized a rescue operation that saved the lives of 669 Jewish Czechoslovakia children from Nazi death camps, and brought them to the safety of Great Britain between the years 1938-1939.

This is from the documentary "Nick's Family" (2011). Sir Nicholas Winton is  age 105.