Across the United States, people are paying tribute to fallen service members.

The Memorial Day holiday is observed on the last Monday in May.

Vice President Mike Pence places a wreath in front of the Tomb of the Unknown Soldier at Arlington National Cemetery.
Vice President Mike Pence places a wreath in front of the Tomb of the Unknown Soldier at Arlington National Cemetery.
Patrick Semansky/AP
Vietnam veteran Joe Mack salutes during the National Anthem as a cemetery in Pittsfield, Massachusetts, commemorates Memorial Day.
Vietnam veteran Joe Mack salutes during the National Anthem as a cemetery in Pittsfield, Massachusetts, commemorates Memorial Day.
Ben Garver/The Berkshire Eagle/AP
Paul Keneka leaves flowers beside the grave of his uncle, Noboru J. Muranaka, at the Los Angeles National Cemetery on Saturday, May 25. Volunteers placed 88,000 American flags on graves in preparation for Memorial Day.
Paul Keneka leaves flowers beside the grave of his uncle, Noboru J. Muranaka, at the Los Angeles National Cemetery on Saturday, May 25. Volunteers placed 88,000 American flags on graves in preparation for Memorial Day.
Mark Ralston/AFP/Getty Images
Members of the Army's Golden Knights parachute team perform during the Bethpage Air Show as part of a Memorial Day weekend event on Long Island, New York, on May 25.
Members of the Army's Golden Knights parachute team perform during the Bethpage Air Show as part of a Memorial Day weekend event on Long Island, New York, on May 25.
Johnny Milano/Reuters
Scouts congregate at Green-Wood Cemetery in Brooklyn, New York, before placing flags at the grave sites of World War I veterans on May 25.
Scouts congregate at Green-Wood Cemetery in Brooklyn, New York, before placing flags at the grave sites of World War I veterans on May 25.
Mary Altaffer/AP
The Empire State Building in New York is lit up in red, white and blue for Memorial Day weekend on Friday, May 24.
The Empire State Building in New York is lit up in red, white and blue for Memorial Day weekend on Friday, May 24.
Gary Hershorn/Getty Images
Bikers participate in a blessing of the bikes event at the Washington National Cathedral on May 24. The Rolling Thunder group is marking the 32nd anniversary of its annual Ride for Freedom motorcycle procession.
Bikers participate in a blessing of the bikes event at the Washington National Cathedral on May 24. The Rolling Thunder group is marking the 32nd anniversary of its annual Ride for Freedom motorcycle procession.
Zach Gibson/Getty Images
People visit the Vietnam Veterans Memorial in Washington on May 24.
People visit the Vietnam Veterans Memorial in Washington on May 24.
Anna Gassot/AFP/Getty Images
Samara Reisenweber helps her father, Air Force Lt. Col. Andrew Reisenweber, place flags at graves at Hampton National Cemetery in Virginia on May 24.
Samara Reisenweber helps her father, Air Force Lt. Col. Andrew Reisenweber, place flags at graves at Hampton National Cemetery in Virginia on May 24.
Adrin Snider/The Daily Press/AP
A Vietnam veteran visits the USAA Poppy Wall of Honor on the National Mall in Washington on May 24. The wall houses 645,000 poppies to commemorate lives lost in service.
A Vietnam veteran visits the USAA Poppy Wall of Honor on the National Mall in Washington on May 24. The wall houses 645,000 poppies to commemorate lives lost in service.
Carolyn Kaster/AP
Travelers wait in line to go through a security checkpoint at Ronald Reagan National Airport in Arlington, Virginia, on May 24. AAA calculated that <a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2Ftravel%2Farticle%2Fmemorial-day-weekend-2019%2Findex.html" target="_blank">almost 43 million Americans will be on the go</a> over the holiday weekend. That would be the second-highest number since the association started tracking holiday travel volumes in 2000.
Travelers wait in line to go through a security checkpoint at Ronald Reagan National Airport in Arlington, Virginia, on May 24. AAA calculated that almost 43 million Americans will be on the go over the holiday weekend. That would be the second-highest number since the association started tracking holiday travel volumes in 2000.
Zach Gibson/Getty Images
A soldier <a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2019%2F05%2F25%2Fus%2Fsolider-braves-elements-to-honor-fallen-soldiers-trnd%2Findex.html" target="_blank">places a flag at the Tomb of the Unknown Soldier</a> during a severe storm in Arlington, Virginia, on Thursday, May 23. "With only a few watching from cover, a Tomb Sentinel approached the Unknowns with (US) flags in hand," the Army's 3rd Infantry Regiment said <a href="index.php?page=&url=https%3A%2F%2Fwww.facebook.com%2Fusarmyoldguard%2Fposts%2F2464461996911228" target="_blank" target="_blank">in a Facebook post.</a> "As thunder shook the ground and rains washed down without abandon, the Tomb Sentinel pierced through the elements with breath-taking precision."
A soldier places a flag at the Tomb of the Unknown Soldier during a severe storm in Arlington, Virginia, on Thursday, May 23. "With only a few watching from cover, a Tomb Sentinel approached the Unknowns with (US) flags in hand," the Army's 3rd Infantry Regiment said in a Facebook post. "As thunder shook the ground and rains washed down without abandon, the Tomb Sentinel pierced through the elements with breath-taking precision."
Sgt. Maryam Treece/US Army
A soldier with the 3rd Infantry Regiment participates in the Flags In event at Arlington National Cemetery on May 23. The cemetery hosted the event to adorn the graves of US service members.
A soldier with the 3rd Infantry Regiment participates in the Flags In event at Arlington National Cemetery on May 23. The cemetery hosted the event to adorn the graves of US service members.
Alex Wong/Getty Images
Soldiers take part in the Flags In event at Arlington National Cemetery.
Soldiers take part in the Flags In event at Arlington National Cemetery.
Kevin Lamarque/Reuters
US President Donald Trump and his wife, Melania, visit Arlington National Cemetery on Thursday, May 23. They were visiting early because they would be in Japan on Memorial Day.
US President Donald Trump and his wife, Melania, visit Arlington National Cemetery on Thursday, May 23. They were visiting early because they would be in Japan on Memorial Day.
JIM WATSON/AFP/Getty Images