A member of the US Army Honor Guard presents a wreath to NASA Administrator Charles Bolden(C) and Dep. Administor Dava Newman(L) near the Tomb of the Unknown Soldier during ceremonies for the remembrance of Apollo 1 and the Space Shuttles Challenger and Columbia January 28, 2016, at Arlington National Cemetery in Arlington, Virginia.
The US space agency marked the 30th anniversary Thursday of the explosion of the space shuttle Challenger with a pledge to remember lost astronauts as it presses on toward Mars. / AFP / PAUL J. RICHARDSPAUL J. RICHARDS/AFP/Getty ImagesA Marine student undergoing the 2nd Marine Division Combat Skills Center’s Pre-Scout Sniper Course prepares to move during a stalking exercise at Camp Lejeune, N.C., Jan. 22, 2016. The exercise required students to traverse approximately 1,000 meters of high grass and fire on a target, all without being detected. (U.S. Marine Corps photo by Cpl. Paul S. Martinez/Released)160128-N-AQ705-024 REPUBLIC OF DJIBOUTI (Jan. 28, 2016) Hospital Corpsman 2nd Class Dustin Burton, of Coastal Riverine Squadron 10, mans a crew-served weapon aboard a patrol boat in the Gulf of Tadjoura, Djibouti, Jan. 28, 2016. U.S. 6th Fleet, headquartered in Naples, Italy, conducts the full spectrum of joint and naval operations, often in concert with allied, joint, and interagency partners, in order to advance U.S. national interests and security and stability in Europe and Africa. (U.S. Navy photo by Master-at-Arms 2nd Class Perry Lafoe/Released)Marines with Battalion Landing Team 1st Battalion, 6th Marine Regiment, 22nd Marine Expeditionary Unit, prepare to deter role players during a non-lethal weapons course at Camp Lejeune, N.C., Jan. 22, 2016. The Marines participated in the course to ensure mission readiness and to improve their ability to maintain control during a riot. (U.S. Marine Corps photo by Cpl. Chris Garcia/Released)A Caterpillar front loader clears the Dover Air Force Base, Del., flightline near a C‐5M Super Galaxy airlift aircraft, assigned to the 436th Airlift Wing, during recovery operations Jan. 25, 2016, after Winter Storm Jonas. Heavy equipment cleared the open areas while hand shovels were used to clear the 22 inches of accumulated snow from around the aircraft. (U.S. Air Force photo/Greg L. Davis)US soldiers give guidance as they train Iraq's 72nd Brigade in a live-fire exercise in Basmaya base, southeast of the Iraqi capital, Baghdad, on January 27, 2016.
The US-led coalition's efforts to train the Iraqi military began in December 2014. Since then, more than 18,000 Iraqi troops have completed courses like the one held at the base in Basmaya. / AFP / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty ImagesSoldiers of Headquarters and Headquarters Troop, 3rd Squadron, 2nd Cavalry Regiment, stationed out of Vilseck, Germany, overlook the terrain of the sniper range and identify the enemy targets, some as far as 900 meters away, during a field training exercise at Adazi Training Center in Latvia, Jan. 27, 2016.A U.S. Air Force F-22 Raptor flies over the Arabian Sea in support of Operation Inherent Resolve, Jan. 27, 2016. The F-22's combination of sensor capability, integrated avionics, situational awareness, and weapons provides first-kill opportunity against threats. OIR is the coalition intervention against the Islamic State of Iraq and the Levant. (U.S. Air Force photo by Staff Sgt. Corey Hook/Released)IMAGE DISTRIBUTED FOR USAA - NFL running back DeAngelo Williams shares a laugh with service members during the 2016 NFL Pro Bowl Draft presented by USAA at Wheeler Army Airfield, on Wednesday, Jan. 27, 2016, in Wahiawa, Hawaii. Williams is a correspondent for USAA as part of its presenting sponsorship of the Pro Bowl.(Kevin Terrell/AP Images for USAA)Members of the Michigan National Guard load bottled water at a fire station, Thursday, Jan. 28, 2016 in Flint, Mich. The Michigan Legislature voted Thursday to direct another $28 million to address Flint's water emergency, allocating money for bottled water, medical assessments and other costs in the city struggling with a lead-contaminated supply. (AP Photo/Carlos Osorio) BOSTON, MA - JANUARY 28: The Walt Disney Studios hosted a special 3D IMAX Screening of the Finest Hours for the US Coast Guard and local family, friends and supporters of the movie which was filmed in Quincy MA.Chris Dodd speaks at the screening of THE FINEST HOURS on January 28, 2016 in Boston, Massachusetts. (Photo by Paul Marotta/Getty Images for Allied Integrated Marketing)Air Force's Zach Moer (41) drives past New Mexico's Joe Furstinger (23) during the first half an NCAA college basketball game, Wednesday, Jan. 27, 2016, in Albuquerque, N.M. (AP Photo/Juan Labreche)
