The country is celebrating the life and legacy of President John. F. Kennedy as he would have turned 100 Monday.
In Boston, more than 4,000 people showed up at the JFK Presidential Library on Monday to view its new exhibit.
The new exhibit at the library called JFK 100 features 100 original artifacts, documents and photographs from his personal and political career.
A flyover also took place over the library.
Boston Mayor Marty Walsh was in attendance to help celebrate the event, which included a cake made by Montillo's in Brockton.
"When you think of what he accomplished in a little under four years as president, time stopped there. But he laid the foundation for a lot of things Johnson carried out — he laid the foundation for a lot of great things," said Walsh.
No members of Kennedy's family were in attendance at the library on Monday, but a flag raised in his honor will be given to his daughter, Caroline.
Also on Monday, the U.S. Postal Service commemorated Kennedy's birthday with the dedication of a new JFK postage stamp in Brookline Massachusetts, where JFK was born.
In Washington, a special wreath-laying ceremony took place at his gravesite at Arlington National Cemetery.
