WHEN US President Joe Biden signed a proclamation on Tuesday establishing a national monument honouring Emmett Till and his mother, Mamie Till-Mobley, it marked the fulfillment of a promise Till’s relatives made after his death 68 years ago.

The black teenager from Chicago, whose abduction, torture and killing in Mississippi in 1955 helped propel the civil rights movement, is now an American story, not just a civil rights story, said Till’s cousin the Rev Wheeler Parker Jnr.

“It has been quite a journey for me from the darkness to the light,” Parker said during a proclamation signing ceremony at the White House attended by dozens, including other family members, members of Congress and civil rights leaders.

“Back then in the darkness, I could never imagine the moment like this, standing in the light of wisdom, grace and deliverance,” he said.

Reaction poured in from elected officials and from the civil rights organising community. The Rev Al Sharpton said the Till national monument designation tells him “that out of pain comes power.”

Till’s family members, along with a national organisation seeking to preserve black cultural heritage sites, say their work protecting the Till legacy continues.

They hope to raise money to restore the sites and develop educational programming to support their inclusion in the National Park System.

Brent Leggs, executive director of the African American Cultural Heritage Action Fund, a programme of the National Trust for Historic Preservation, said the federal designation is a milestone in a years-long effort to preserve and protect places tied to events that have shaped the nation and that symbolise national wounds.

“We believe that not until black history matters will black lives and black bodies matter,” he said. “Through reckoning with America’s racist past, we have the opportunity to heal.”

The African-American Cultural Heritage Action Fund has provided $750,000 in grant funding since 2017 to help rescue sites important to the Till legacy. A number of other philanthropic organisations have contributed several million dollars towards preservation of the Till sites.

Biden’s proclamation protects places that are central to the story of Emmett Till’s life and death at age 14, the acquittal of his white killers by an all-white jury and his late mother’s activism.

In the summer of 1955, Mamie Till-Mobley put her son Emmett on a train to her native Mississippi, where he was to spend time with his uncle and his cousins. In the overnight hours of August 28 1955, Emmett was taken from his uncle’s home at gunpoint by two vengeful white men.

Emmett’s alleged crime? Flirting with the wife of one of his kidnappers.

Three days later, a fisherman on the Tallahatchie River discovered the teenager’s bloated corpse — one of his eyes was detached, an ear was missing, his head was shot and bashed in.

Till-Mobley demanded that Emmett’s mutilated remains be taken back to Chicago for a public, open-casket funeral that was attended by tens of thousands of people.

Graphic images taken of Emmett’s remains, sanctioned by his mother, were published by Jet magazine and fueled the civil rights movement.

At the trial of his killers in Mississippi, Till-Mobley bravely took the witness stand to counter the perverse image of her son that defence attorneys had painted for jurors and trial watchers.

Altogether, the Till national monument will include 5.7 acres (2.3 hectares) of land and two historic buildings.

The Mississippi sites are Graball Landing, the spot where Emmett’s body was pulled from the Tallahatchie River just outside of Glendora, Mississippi, and the Tallahatchie County Second District Courthouse in Sumner, Mississippi, where Emmett’s killers were tried.

At Graball Landing, a memorial sign installed in 2008 had been repeatedly stolen and was riddled with bullets. An inch-thick bulletproof sign was erected at the site in October 2019.

The Illinois site is Roberts Temple Church of God in Christ in Chicago, where Emmett’s funeral was held in September 1955.

Illinois senator Tammy Duckworth, who originally introduced the bipartisan legislation to federally recognise and protect Roberts Temple, noted the church's importance to the history of Chicago and the nation.

“It’s past time we recognise how national monuments can not only teach us about our history — but provoke us to build a more just future,” the Democratic senator said in a statement.

Mississippi state senator David Jordan, 90, was a freshman at Mississippi Valley State College in 1955 when he attended part of the trial of the two men charged with killing Emmett.

As a state senator for the past 30 years, Jordan, who is black, spearheaded fundraising for a statue of Emmett Till that was dedicated last year in Greenwood, Mississippi, a few miles from where the teenager was abducted.

On Tuesday, Jordan praised Biden for creating the Till national monument.

“It’s one of the greatest honours that a president could pay to a person, 14, who lost his life in Mississippi that’s created a movement that changed America,” Jordan told the AP.

Daphne Chamberlain, a history professor at Tougaloo College in Jackson, Mississippi, said Emmett’s brutal killing continues to resonate in racial justice issues of today.

“Over the past decade or so, we have seen as a nation the murder of young black men like Trayvon Martin, Tamir Rice, Tyre Nichols in Memphis, [and] Ahmaud Arbery,” she said. “In each of these instances, what we have also seen is the bravery of the mothers in coming to the forefront and speaking out against what happened to their sons, but also making sure that they stayed the course in pursuing justice.”

The Till national monument joins dozens of federally recognised landmarks, buildings and other places in the Deep South, in the north and out west that represent historical events and tragedies from the civil rights movement.

For example, in Atlanta, sites representing the life and legacy of the Reverend Martin Luther King Jnr, including his birth home and Ebenezer Baptist Church, are all part of the National Park Service.

The designation often requires public and private entities to work together on developing interpretation centres at each of the sites, so that anyone who visits can understand the site’s significance.

The hiring of park rangers is supported through partnerships with the National Park Foundation, the park service’s official non-profit, and the National Parks Conservation Association.

Increasingly, the park service includes sites “that are part of the arc of justice in this country, both telling where we’ve come from, how far we’ve come, and frankly, how far we have to still go,” said Will Shafroth, the president and CEO of the National Park Foundation.

For Parker, who was 16 years old when he witnessed Emmett’s abduction, the Till monument proclamation begins to lift the weight of trauma that he has carried for most of his life.

In an interview with the AP ahead of Tuesday’s White House event, Parker reflected on the decades-long fight to portray Emmett and his story in a proper light.

“I’ve been suffering for all these years of how they’ve portrayed him — I still deal with that,” Parker, 84, said of his cousin Emmett.

“The truth should carry itself, but it doesn’t have wings. You have to put some wings on it.”