Previous to NBC, Peter was Travel correspondent for ABC's Good Morning America from 1988 to 1995.

Also known as the "Travel Detective"—he has published several books with that moniker—Greenberg was brought to NBC's Today by Jeff Zucker.

The series features various heads of state giving Greenberg and viewers a personal tour of their country.

It has featured a number of world leaders including New Zealand's Helen Clark, Israel's Benjamin Netanyahu, Abdullah II of Jordan, Peru's Alejandro Toledo, Mexico's Felipe Calderón, Rwanda's Paul Kagame, Poland's Mateusz Morawiecki and Tanzania's Samia Suluhu Hassan.

Greenberg also produces and hosts The Travel Detective TV series on public television stations.