Updated

A new marker being unveiled in Dealey Plaza will feature the last paragraph of a speech President John F. Kennedy was set to give 50 years ago.

Kennedy's motorcade was en route to a luncheon at the Dallas Trade Mart when he was assassinated.

The speech was to have ended with Kennedy noting that Americans are "watchmen on the walls of world freedom" and therefore must strive to be worthy of that power and try to achieve peace.

Ruth Altshuler chairs the committee that organized the city's event marking the 50th anniversary of the assassination. She says the marker will be "very dignified and very tasteful and very meaningful."