The photo you describe is at the Boston Globe website. They changed everything to JAVA, so I can't give you a direct link.
1. Start here:
http://www.boston.com/globe/nation/packages/kerry/061503.shtml
2. Click on "more photos" to the right of the Kennedy photo
3. Select "Part 3"
4. On the right hand side, click "next" until you get to about the 5th picture in "Part 3".
The caption of that photo says:
"John Kerry, a director of the Vietnam Veterans against the War, testifies before the Senate Foreign Relations committee April 22, 1971.
CORRECTION... (I hate Java!)
The Nixon photo says:
"John Kerry watches President Richard Nixon announce the cease-fire in Vietnam on January 24, 1973. "