Back up to the AP photo captions. They identify two different photographers. I assume they are AP photographers.
at post #357:
Democratic Presidential candidate John Kerry (news - web sites) gives the thumbs-up to the media as he leaves the Ronald Reagan (news - web sites) Presidential Library in Simi Valley, Calif., Tuesday, June 8, 2004. Kerry visited the casket containing the remains of President Ronald Reagan.(AP Photo/Ric Francis)
at post #410:
Democratic presidential candidate Sen. John Kerry (news - web sites), D-Mass., puts his hand over his heart as he pays respect to former President Ronald Reagan (news - web sites) at the Ronald Reagan Presidential Library in Simi Valley, Calif. on Tuesday, June 8, 2004. (AP Photo/Jeff Chiu)
[Not sure who took this. It may also be Jeff Chiu.]
Notice the Chiu photo(s) are on Kerry's left to right. My screencap is right to left (and cameraman to Kerry's left, just partially caught on screencap).