The on-screen quote that appears at the end of the visit:
"And they shall beat their swords into plowshares,
And their spears into pruning forks;
Nation shall not lift up sword against nation,
Neither shall they learn war any more."
is from Isaiah 2:4.
The first visit to MGR-TV studios during the Modern Era.
The record Rogers plays may have been side 2 of Mister Rogers Sings for Times When You're Angry.