Nixon gave a speech from the rear platform of the train.
The man stood on the rear platform and stretched himself.
The killer must have been standing on the rear platform, where he'd be alone.
"Last I saw of them, both men went out on the rear platform," a passenger said.
As the train pulled in, he mounted the rear platform.
He stepped out onto the rear platform, closed the hatch behind him, and turned to look at the man.
He stood on the rear platform and waved to them as the train pulled out.
Without a word, he turned and descended the steps of the rear platform.
In the last of the presidential cars, Lincoln stood on the rear platform.
Then you jump in front and me on the rear platform.