(AP) — Americans plan to gather at cemeteries, memorials and monuments nationwide to honor fallen military service members on Memorial Day.

President Barack Obama is expected to lay a wreath Monday at the Tomb of the Unknown Soldier at Arlington National Cemetery across the Potomac River from Washington.

Another wreath-laying ceremony is planned at the Franklin D. Roosevelt Four Freedoms Park in New York City. The park is a tribute to President Roosevelt’s famous speech supporting freedom of speech, freedom of worship, freedom from want and freedom from fear.

In one of several ceremonies honoring Americans killed in Afghanistan, the city of South Sioux City, Neb., plans to unveil a statue honoring Navy Petty Officer 1st Class John Douangdara, a dog handler for the SEALs killed in a 2011 helicopter crash.

A national moment of remembrance takes place at 3:00 p.m. local time at Fort McPherson National Cemetery south of Maxwell.