A new section of the border wall is seen in November 2019 south of Donna, Texas. Trump's 576-mile border wall is expected to cost nearly $20 million per mile, which is more expensive than any other wall under construction in the world. Verónica G. Cárdenas for NPR hide caption
A 30-foot border barrier — as tall as a two-story building — rises from the desert near Lukeville, Ariz. Laiken Jordahl /Center for Biological Diversity hide caption
The U.S. can prove that the amphibious assault ship USS Boxer destroyed one of Iran's drones, a senior Trump administration official says. Lance Cpl. Israel Chincio/11th Marine Expeditionary Unit hide caption
In this 2011 photo, Hu Jintao, then China's president, visits the Confucius Institute at the Walter Payton College Preparatory High School in Chicago. China established more than 100 Confucius Institutes, which provide language and culture programs, at U.S. schools. But at least 13 universities have dropped the program due to a law that raises concerns about Chinese spying. Chris Walker/AP hide caption
Acting Secretary of Defense Patrick Shanahan was cleared by the Pentagon's Inspector General of allegations of ethics violations. Shanahan is seen here testifying at a House Armed Services Committee hearing last month. Drew Angerer/Getty Images hide caption
Migrants trudge along the border fence to a waiting bus after turning themselves in to the Border Patrol at the U.S.-Mexico border near El Paso, Texas. John Burnett/NPR hide caption
A Pakistani immigrant U.S. Army recruit, seen last year. A judge ruled this week that the Pentagon may not require soldiers who are naturalized citizens to undergo "continuous monitoring." Mike Knaak/AP hide caption
Vice President Pence announces the Trump Administration's plan to create the U.S. Space Force by 2020 during a speech at the Pentagon on Thursday. Chip Somodevilla/Getty Images hide caption
Modern tools of biology could allow someone to recreate a dangerous virus, such as smallpox, from scratch. Dr. Hans Gelderblom/Visuals Unlimited/Getty Images hide caption
The USS Carl Vinson transits the Philippine Sea while conducting a bilateral exercise with the Japan Maritime Self-Defense Force last April in the Philippine Sea. Handout/Getty Images hide caption
In this frame from a video, a member of the National Guard watches over Rio Grande River on the border in Roma, Texas, on Tuesday. The deployment of National Guard members to the U.S.-Mexico border at President Trump's request was underway Tuesday with a gradual ramp-up of troops under orders to help curb illegal immigration. John Mone/AP hide caption
Afghan commandos train for a night raid on a Taliban-controlled village in June 2016. David Gilkey/NPR hide caption
A floor of office space in Trump Tower, where President Trump lives with his family in a penthouse apartment, can rent for as much as $1.5 million a year. Mark Lennihan/AP hide caption
This February 2012 image shows the U.S. guided-missile destroyer Lassen. The U.S. Navy sent the warship within 12 nautical miles (about 22 kilometers) of islands artificially created by China in the South China Sea. Kyodo /Landov hide caption
Democratic presidential candidate Hillary Clinton speaks during a community forum on health care at Moulton Elementary School in Des Moines, Iowa, on Tuesday. Charlie Neibergall/AP hide caption
A view inside the Washington National Guard Army Aviation Support Facility on Joint Base Lewis-McChord in February. As Congress cuts $500 billion from the Defense Department budget, the National Guard and active Army are competing for the same dollars. Patricia Murphy/KUOW hide caption
The grave at the Manila American Cemetery and Memorial, where Bud Kelder's family believes he is buried. Courtesy of John Eakin hide caption
John Brennan, who President Obama wants to lead the CIA. Alex Wong/Getty Images hide caption