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Congress NFL Concussions
FILE - In this June 10, 2013 file photo, Rep. Frank Pallone, Jr. speaks in Trenton, N.J. Pallone has found that National Football League officials improperly sought to influence a government study on the link between football and brain disease. Pallone's report says the league tried to strong-arm the National Institutes of Health into taking the project away from a researcher that the NFL feared was biased. (AP Photo/Mel Evans, File)
Avengers Visit Fan
In this Monday, May 23, 2016, photo provided by Amy Wilcox, Captain America Chris Evans talks with Ryan Wilcox during a surprise visit with Wilcox at his home in El Cajon, Calif. The Avengers teamed up to lift the spirits of the teenage fan, Ryan Wilcox, a junior, who has been at home for months battling leukemia. (Amy Wilcox via AP)
Baby Elephant-Dallas Zoo
This May 2016 image provided by the Dallas Zoo shows a baby elephant at the zoo in Dallas. The male calf was delivered of a mother that was one of five African elephants brought to the Dallas Zoo after their rescue from the southern African nation of Swaziland. (Dallas Zoo via AP) MANDATORY CREDIT
biden Cancer
In this May 20, 2016, file photo, Vice President Joe Biden listens as President Barack Obama speaks to members of the media in the Oval Office at the White House in Washington Biden will bring together scientists, oncologists, donors and patients for a national conference on cancer research in Washington, the White House said May 24. Dubbed the “National Cancer Moonshot Summit,” the summit is scheduled for June 29 at Howard University, and the White House said it planned to organize dozens regional summits on the same day in communities far from the capital. (AP Photo/Andrew Harnik)