Victory in Afghanistan has eluded Trump's predecessors: President George W. Bush, who launched the war after the Sept. 11, 2001 attacks, and President Barack Obama, who surged U.S. troop levels to 100,000, but ultimately failed in fulfilling his promise to bring the conflict to a close before leaving office.
As Trump now takes his turn at the helm, he faces many of the same challenges that have bedeviled those previous presidents and left some U.S. officials deeply uncertain about whether victory is indeed possible.
Experts have long warned that watching a solar eclipse without proper eyewear can lead to potential damage in your eyes.
But what might that damage look like?
Dr. Linda Chous, chief eye care officer for UnitedHealthcare, helps answer that question.
U.S. military photos
The U.S. Navy ordered a broad investigation into the performance and readiness of the Pacific-based 7th Fleet after the USS John S. McCain collided with an oil tanker in Southeast Asia, leaving 10 U.S. sailors missing and five injured.
It was the second major collision in two months involving the 7th Fleet. Seven sailors died in June when the USS Fitzgerald and a container ship collided in waters off Japan.
Vessels and aircraft from the U.S., Indonesia, Singapore and Malaysia were searching for the missing sailors.
AP Photo/Carolyn Kaster
Reversing his past calls for a speedy exit, President Donald Trump renewed the United States' commitment Monday to the 16-year-old war in Afghanistan, declaring that U.S. troops must "fight to win." He pointedly declined to disclose how many more troops might be sent to wage America's longest war.
AP Photo/Ted S. Warren
The stars came out in the middle of the day, zoo animals ran in agitated circles, crickets chirped, birds fell silent and a chilly darkness settled upon the land Monday as the U.S. witnessed its first full-blown, coast-to-coast solar eclipse since World War I.
Millions of Americans gazed in wonder at the cosmic spectacle, with the best seats along the so-called path of totality that raced 2,600 miles (4,200 kilometers) across the continent from Oregon to South Carolina.
"It was a very primal experience," Julie Vigeland, of Portland, Oregon, said after she was moved to tears by the sight of the sun reduced to a silvery ring of light in Salem.
See a time lapse of the 2017 solar eclipse in just under three minutes.
AP/Getty Images (File)
In an address to the nation Monday night, President Donald Trump laid out an updated approach to the U.S. military's actions in Afghanistan and South Asia.
Members of Congress on both sides of the aisle reacted swiftly, with some calling for a broader and more inclusive discussion with lawmakers, and with the American people, about the U.S.'s continued involvement in Afghanistan.
Steve Ruark/AP (File)
The 16-year conflict in Afghanistan has cost thousands of lives and billions of dollars, as NBC News reports, and it has now spread across three presidential administrations.
Then-President Barack Obama ended the combat mission “Operation Enduring Freedom” in 2014, but the two countries eventually agreed that the U.S. would keep some troops in Afghanistan even after the combat mission concluded.
Get More at NBC News
AP Photo/Cliff Owen
Anger boiled over at the first Charlottesville City Council meeting since a white nationalist rally in the city descended into violent chaos, with some residents screaming and cursing at councilors Monday night and calling for their resignations.
Scores of people packed the council's chambers, and The Daily Progress reported Mayor Mike Signer was interrupted by shouting several times in the first few minutes of the meeting. As tensions escalated, the meeting was halted. Live video showed protesters standing on a dais with a sign that said, "Blood on your hands."
AP Photo/Elise Amendola, File
Two members of the Kennedy family have been arrested in Massachusetts following complaints about a loud party and fireworks.
Barnstable Police arrived to 172 Irving Ave. at 1 a.m. Sunday after receiving multiple calls for the loud party, as well as fireworks. The home is near the Kennedy compound.
Arrested at the scene were Matthew "Max" Kennedy, 52, of Hyannisport, and his daughter, Caroline, 22, of Pacific Palisades, California.
NBC 4 NY
Two surfers from Brooklyn narrowly missed a shark attack in Cape Cod Monday.
A shark appeared and killed a seal not far from the shore in front of terrified beachgoers at Nauset Beach near Chatham, about two hours south of Boston.
The two surfers happened to be just feet away from the jaws of the shark. For a few minutes, people on the beach were in a panic, believing one of the men had been killed. In fact, it was the seal next to the surfer that the shark grabbed.
President Trump addressed members of the military and the country as he laid out his plans for U.S. involvement in Afghanistan.
AFP/Getty Images, File
Corporate fallout over President Donald Trump's comments on the violence that erupted in Charlottesville, Virgina, continues as two more charities announced this weekend they would cancel gala fundraisers at Trump’s Mar-a-Lago Club in Palm Beach, Florida.
The Preservation Foundation of Palm Beach and Palm Beach Zoo & Conservation Society both dissociated from the Trump property this weekend, NBC News reported.
The moves follow a divisive press conference last Tuesday where Trump refused to draw distinctions between neo-Nazi ralliers and their counter-protesters, instead blaming "both sides."
Get More at NBC News
The giraffes ran in circles. The flamingos huddled together. And the rhinos just looked confused.
At the Nashville Zoo, visitors watched and recorded how the animals behaved when the sky turned dark during Monday's total solar eclipse. And there was plenty to see when the moon slipped in front of the sun.
Kissimmee Police Department/Orlando Sentinel via AP
The suspect in the fatal shootings of two police officers in Florida shouted "I'm innocent" as he was arrested, according to an arrest affidavit released Monday.
Everett Miller shouted "I didn't do it. I'm a veteran" when he was arrested in a bar a few hours after the fatal shooting of the two Kissimmee Police Department officers Friday night, according to the affidavit. Kissimmee is located south of the theme park hub of Orlando.
Deputies who arrested him said he appeared to reach for a weapon in his waistband before he was subdued.