Soldiers from the 541st Sapper Company headed to the southern U.S. border prepare to board an air transport plane on Tuesday in Ft. Knox, Ky. Airman 1st Class Daniel Hernande/U.S. Department of Defense hide caption
National Security National Security
National Security
Wednesday
People protest the arrival of President Trump as he visits the Tree of Life synagogue in Pittsburgh on Tuesday. Many Americans fear more violence in U.S. political life. Brendan Smialowski/AFP/Getty Images hide caption
Another 'Civil War'? Pessimism About Political Violence Deepens In A Divided Nation
Tuesday
Pallbearers carry the caskets of brothers Cecil Rosenthal, 59, and David Rosenthal, 54, on Tuesday in Pittsburgh, Pa. The brothers were among 11 killed in the mass shooting at the Tree of Life Synagogue last Saturday. Jeff Swensen/Getty Images hide caption
Pittsburgh Shooting And Other Cases Point To Rise In Domestic Extremism
The special counsel's office says it has referred an alleged scheme to make false claims against Robert Mueller to the FBI. Tom Williams/CQ-Roll Call Inc./Getty Images hide caption
President Trump suggested that he and his attorneys are on track to give written answers to special counsel Robert Mueller's questions about the Russian attack on the 2016 election. Alex Wong/Getty Images hide caption
Monday
A border protection officer stands next to a recently upgraded section of fencing at the U.S.-Mexico border in Calexico, Calif., on Friday. The Pentagon says it will send 5,000 U.S. troops to the border. Mark Ralston/AFP/Getty Images hide caption
Rep. Devin Nunes, R-Calif., leaves a meeting on Capitol Hill in January. The House Intelligence Committee chairman is locked in a fierce re-election battle. Mark Wilson/Getty Images hide caption
Devin Nunes' Re-Election Tests Whether All Politics Are Now National
Saturday
A helicopter view of the National Security Agency in Fort Meade, Md., in 2016. Brendan Smialowski/AFP/Getty Images hide caption
Friday
Attorney General Jeff Sessions speaks at a press conference about the apprehension of a suspect in the recent spate of mail bombings at the Department of Justice on October 26, 2018 in Washington, DC. Aaron P. Bernstein/Getty Images hide caption
Members of a haz-mat team help remove a hazardous materials suit from an investigator (in white) who emerged from the U.S. Post Office in West Trenton, N.J., on Oct. 25, 2001. Samples from the facility were part of an investigation into letters containing anthrax. Tom Mihalek/AFP/Getty Images hide caption
Thursday
One of the package bombs that was sent to a critic of President Trump is shown. Experts say excessive postage is a key sign of a suspicious package. FBI via Getty Images hide caption
Package Investigation Puts Spotlight On Postal Service Screening
Tuesday
President Trump addresses the crowd during a rally in support of Sen. Ted Cruz, R-Texas, on Monday in Houston. Loren Elliott/Getty Images hide caption
FACT CHECK: President Trump's False Claims On Migrant Caravan, Tax Cuts
National Security Adviser John Bolton speaks with Russian President Vladimir Putin at the Kremlin on Tuesday. After their meeting, Bolton told reporters the U.S. still intends to withdraw from the Cold War-era Intermediate-Range Nuclear Forces Treaty. Maxim Shipenkov/AFP/Getty Images hide caption
President Ronald Reagan, right, and Soviet leader Mikhail Gorbachev sign the Intermediate-Range Nuclear Forces Treaty in the White House East Room on December 8, 1987. AFP/Getty Images hide caption
The X-51A Waverider was a prototype hypersonic missile capable of flying at Mach 5.1 for hundreds of miles. The Air Force is stepping up its development of similar weapons. Mike Cassidy/U.S. Air Force hide caption