Honoring the heroes who made the ultimate sacrifice for our country.

Biden: "As a nation we have many obligations, but I believe we have only one truly sacred obligation. Prepare those we send into harm's way and care for them and their families..."

On this Memorial Day holiday we visit cemeteries across the country to recognize those that sacrificed their lives.

ABC News meteorologist Somara Theodore tracks the weather from coast-to-coast as millions of Americans celebrate Memorial Day.

What to expect if you're hitting the roads or the beach.

ABC News’ Trevor Ault reports on the busiest travel weekend in years.

As millions of Americans are flying and hitting the roads in numbers not seen since before the pandemic, weather threatens to wash out holiday plans from the Carolinas to the Mid-Atlantic.

Service members placed flags in front of more than 270,000 headstones at Arlington National ceremony while in Boston volunteers arranged more than 37,000 flags at the Soldiers and Sailors Monument.

Americans are hitting the roads, rails, and skies in numbers not seen since before the pandemic during the Memorial Day weekend.

Air travel is above pre-pandemic levels as 27 million are expected to take the roads over the holiday weekend.

A look at the numbers behind Memorial Day travel as its forecasted to be one of the busiest travel weekends since 2019.

Airlines are promising to avoid a repeat of last year’s major delays. ABC News’ Rhiannon Ally reports.

A mom is speaking out about a terrifying close call for her three kids and family who were swept out to sea.

ABC News’ Gio Benitez reports on the airports across the U.S. preparing for nearly 3.4 million people traveling via the skies this holiday weekend.

ABC News meteorologist Sam Champion shares the holiday weekend forecast across the U.S.

ABC News’ Trevor Ault reports on the latest traffic conditions and expectations for road travel in the U.S. on Memorial Day.

ABC News’ Trevor Ault reports on traffic expectations and latest Memorial Day road travel.

ABC News’ Gio Benitez reports on the latest airline data, including busiest travel times.

The numbers of air and road travelers are expected to be significantly higher than last year.

Airports across the country are bracing for a crush of passengers for Memorial Day weekend. One of the busiest hubs is now asking for extra security to deal with unruly passengers.

Some U.S. carriers expect to carry over 2 million passengers over the holiday.

ABC News’ Becky Worley weighs in on everything to buy now when it comes to holiday weekend sales.

The agency anticipates this will be the third-busiest Memorial Day weekend since 2000.

Plus, new video and 911 calls from Uvalde shooting, tips and tricks for summer travel and Queen Elizabeth to commemorates 70 years on the throne.

Later, he and families of the fallen plant a magnolia tree at the White House.

From appliances to clothing, ABC News’ Becky Worley breaks down which retailers are offering the biggest discounts on items for the holiday.

ABC News’ Victor Oquendo shares tips on how to find the best and worst times to hit the road and how to save money at the pump for travelers heading home after the holiday weekend.

Delta Airlines, which saw the most cancellations, said the issues stemmed from bad weather and “air traffic control actions.”

The USAA Poppy Wall of Honor -- honoring the more than 645,000 Americans who have been killed in military service -- returned to the National Mall for Memorial Day

Two thousand flights have been canceled since Friday.

ABC News' Becky Worley shares tips for hunting down this weekend's best deals.

Despite supply chain shortages and inflation concerns, there are still great deals to find on summer items this weekend if you know where to look.

Over the weekend, an estimated 34 million people traveled and more 7 million people were screened at airports between Thursday and Sunday. There were about 135,000 fans at the Indy 500.

At Arlington National Cemetery, service members placed flags at each of the 260,000 headstones in honor of the lives lost. Across the country, people paused to honor those who died in combat.

Representative Mark Takano discusses what Congress is doing to support those who have served our country.

Thousands of motorcycle riders rolled through Washington, D.C., to raise awareness about issues facing American veterans.

As the sole survivor, Beau Wise was told he would not be put in harms way -- the only service member to be kept from combat in the Afghanistan war for such a reason.

Big discounts and bargains are available for those shopping this Memorial Day weekend.

Lifestyle expert Valerie Greenberg is here with the lowdown on all the deep discounts.

ABC News’ MaryAlice Parks reports on food insecurity among military families and efforts by advocates and lawmakers to address the problem, which has worsened during the pandemic.

Americans are used to showing their patriotism on Memorial Day, but experts say this holiday many of the nation’s troops need more than a salute -- ​they need food.

There are high volumes of car traffic and airline passengers as people travel for Memorial Day weekend.

U.S. military service members placed flags at gravestones in Arlington National Ceremony in Virginia to mark Memorial Day.

The U.S. Air Force Thunderbirds squadron rehearsed ahead of their Memorial Day weekend show at Jones Beach State Park in New York.

More than 37 million people are expected to travel this Memorial Day weekend.

Tips to avoid traffic and what to expect on the road and in the air over Memorial Day weekend.

Americans hitting the road over the long weekend can expect to see the highest gas prices in seven years and for travel time to take at least 20% longer than normal, according to experts.

Major releases, like “Cruella" and “A Quiet Place 2,” will make their cinema debut during the holiday weekend, marking the start of the first summer blockbuster season since the pandemic began.

With 2.5 million Americans expected to fly over the long holiday weekend, Secretary of Homeland Security Alejandro Mayorkas shares how the spike in travel could affect your airport experience.

More than 37 million Americans are expected to take to the roads and skies in the busiest holiday weekend in over a year.