Book: Agent almost accidentally shot LBJ

President Lyndon B. Johnson, shown Feb. 28, 1965, launches the American Red Cross 1965 national campaign for members and funds in a message recorded at the White House for national broadcast. He proclaimed March as Red Cross month, urging the American people to join up and join in, to give the "Support that your Red Cross needs and do it in every way that you can." (AP Photo/ho)

October 20, 2010 3:22:18 PM PDT
A new tell-all book written by a former secret service agent reveals how close he came to accidentally killing a president.

Former agent Gerald Blaine says he nearly shot Lyndon Johnson just hours after president John F. Kennedy was assassinated.

Blaine was standing guard outside Johnson's home when he heard footsteps. He picked up a submachine gun and pointed it at the silhouette of the man approaching him and that man turned out to be the newly sworn in President Johnson.

No one was hurt.