No US president was ever killed in an airplane or any kind of accident. The president of Poland was killed in April , 2010 .
Which president was killed by disgruntled office worker?
Justin Timberlake
Lyndon B. Johnson became President when President John F. Kennedy was shot and killed on November 22, 1963.
The Vice president.
He was killed in Dallas, Texas.
Vice President Andrew Johnson nor Lyndon B. Johnson were not killed
If both of them are killed at the same time then speaker of the house becomes president
So that if one location was attacked and the President was killed, then the Vice-President would still be alive and able to run the country.
Vice President
president harrison died of pnemoiuna
If you are asking about President Obama's father, Barack Obama, Sr., then he was killed in an auto accident, perhaps due to DUI. If you mean the President, he is very much alive.