NEW YORK, NEW YORK - SEPTEMBER 11: Democratic presidential nominee Joe Biden (L) and U.S. Vice President Mike Pence (R) greet each other during a 9/11 memorial service at the National September 11 Memorial and Museum on September 11, 2020 in New York City.

NEW YORK, NEW YORK – SEPTEMBER 11: Democratic presidential nominee Joe Biden (L) and U.S. Vice President Mike Pence (R) greet each other during a 9/11 memorial service at the National September 11 Memorial and Museum on September 11, 2020 in New York City.