WORLD’s Jamie Dean has the latest on the whereabouts of South Carolina Gov. Mark Sanford, who arrived this morning from Argentina—not the Appalachian Trail, as was reported by his staff yesterday. Jamie writes:

Despite the perplexing details, Sanford told reporters at the Atlanta airport the explanation was simple: After a grueling legislative session, he wanted a few days off. He wanted to go somewhere exotic. He wanted to get out of the bubble.

But is it acceptable for a state’s top public official to simply disappear and be incommunicado, even to his own staff? When asked why staffers said he was on the Appalachian Trail, Sanford replied, “I don’t know.” But then he clarified: He told his staff he might go to the Appalachian Trail. Sanford’s spokesman didn’t immediately respond to requests for comment on the conflicting stories, but his office announced a 2 p.m. press conference.

Read Jamie’s entire report here and look for updates from her after today’s press conference.

UPDATE: Sanford admits to being unfaithful to his wife with a friend from Argentina.

Here’s an excerpt from the governor’s press conference:

UPDATE: Jamie Dean’s post-press conference report, which includes an interview with Sanford’s pastor, is now posted.