This combination of April 15, 2013 and April 2, 2014 photos show a police officer clearing Boylston Street following a bomb blast near the finish line of the 2013 Boston Marathon, and pedestrians crossing at the same corner nearly a year later in Boston. (Photo by Charles Krupa/AP Photo)

U.S. Army Sgt. Patricia Foust receives a free Christmas tree on December 7, 2011 at Fort Carson in Colorado Springs, Colorado. More than 600 soldiers and military families at the base chose trees as part of the annual Trees for Troops program. (Photo by John Moore/Getty Images)

“A prototype lunar lander was destroyed on August 9, 2012, at Kennedy Space Center during its first free flight”. – James Dean via Florida Today

Photo: Morpheus Ground Level Hot Fire. Photo Date: April 2nd 2012. Location: VTB Flight Complex; Photographer: Joe Bibby

In this September 5, 2012 file photo, people run for cover as smoke rises from the site of a fire at a fireworks factory on the outskirts of Sivakasi, about 500 kilometers (310 miles) southwest of Chennai, India. Police in southern India arrested six employees of the fireworks factory for a massive blaze that killed 40 workers and injured 60 others. (Photo by AP Photo/File). P.S. I didn't publish the photos which you already saw here (Avax).

Anand Varma, a U.S. photographer working for the National Geographic, won the First Prize in the Nature Category, Stories, of the 2015 World Press Photo contest with his series of pictures, which includes this one of spores of a fungus landing on an ant, penetrating its exoskeleton and entering its brain, compelling the host to leave its normal habitat on the forest floor and scale a nearby tree, in this picture taken January 22, 2014 and released by the World Press Photo on February 12, 2015. (Photo by Anand Varma/Reuters/National Geographic/World Press Photo)

A general view of the Coe Collection of American Indian Art press view at the Metropolitan Museum of Art on December 19, 2011 in New York City. (Photo by Dario Cantatore/Getty Images)

Alice Ross views a gold crown which was presented to Queen Victoria, part of the Royal Collection on display at the Queens Gallery on March 13, 2012 in Edinburgh, Scotland. The exhibition, which marks Her Majesty The Queen's Diamond Jubilee, reflects the tastes of monarchs and other members of the royal family who have shaped one of the world's great art collections. (Photo by Jeff J. Mitchell/Getty Images)

A visitor looks at a Morris Mini-Minor Car on display at the Victoria and Albert museums' new major exhibition, “British Design 1948-2012: Innovation In The Modern Age” on March 28, 2012 in London, England. This car, which was designed by Alec Issigonis, was the first one off the production line. The exhibition showcases some of the most iconic product design, fashion, furniture, graphics, architecture and fine art from the last 60 years, and opens to the public from March 31, 2012. (Photo by Dan Kitwood/Getty Images)