are the Cemeterist Project and the Global Family Reunion Project, a tie-in to a worldwide family genealogy event that was hosted by author A.J. Jacobs. The Global Family Reunion took place at the New York Hall of Science, located in Flushing Meadows-Corona Park, Queens, on June 6, 2015. The site also maintains a blog that presents two other frequently visited pages: the “Profile of the Week” and the “Photo of the Week”. Active members are asked to view and vote on the best submissions for each category. Events WikiTree runs a variety of events, many of which are recurring. Ongoing or recurring events include the Data Doctors Challenge, which cleans up database errors; the 52 Weeks of Photos Challenge, which encourages members to add a photo a week to a profile; and the WikiTree Challenge, in which a team of volunteer genealogists collaborate to make discoveries for a special guest star. WikiTree Challenge guests in 2022 included Wikipedia founder Jimmy Wales. Previous guests have included Henry Louis Gates Jr. of the show Finding Your Roots, CeCe Moore of the show The Genetic Detective, writer A. J. Jacobs, and other writers and lecturers from the genealogy community. GEDCOM uploads and matching Users can upload computer-generated GEDCOM files with digital genealogical data gathered from personal research and recollections, as well as from other non-copyrighted sources available elsewhere on the internet. Once a user's GEDCOM file is uploaded, WikiTree's "GEDCompare" tool compares data contained in the file and identifies matches with existing profiles, allowing users to find details about their ancestors that have already been entered by others, and eliminating the creation of duplicated profiles. DNA testing and confirmation WikiTree supports doing DNA-based genealogy using DNA Ancestor Confirmation Aid (ACA), a tool that allows members to upload the results of their Y-chromosome (Y-DNA) and mitochondrial (mtDNA) tests for purposes of scientifically confirming paternal (male) and maternal (female) relationships within their family tree. The ACA is designed to: confirm or reject paternal and maternal relationships over the past five generations (when DNA test results are available for other family members); list relevant DNA tests that would aid in the confirmation of such relationships for family members who have not been tested; show which such relationships have already been confirmed (via comments provided by other tested relatives); identify which relatives should take certain tests in order to confirm or reject such relationships; and, aid in