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Sci/tech in pictures

The Associated Press
Demonstrators hold a sign during a "100 Days of Failure" protest and march, Saturday, April 29, 2016, in Chicago. Thousands of people across the U.S. are marking President Donald Trump's hundredth day in office by marching in protest of his environmental policies.
The Associated Press
Demonstrators sit on the ground along Pennsylvania Ave. in front of the White House in Washington, Saturday, April 29, 2017, during a demonstration and march. Thousands of people gathered across the country to march in protest of President Donald Trump's environmental policies, which have included rolling back restrictions on mining, oil drilling and greenhouse gas emissions at coal-fired power plants. The demonstrators sat down for 100 seconds to mark President Trump's first 100 days in office.
The Associated Press
A Sheriff officer stands guard over inmates at the Twin Towers Correctional Facility Thursday, April 27, 2017, in Los Angeles. One of the world's largest jail complexes is located in Los Angeles and within it resides perhaps the world's largest group of inmates whose mental illness is attributed to drug abuse, mainly from highly addictive methamphetamine.
Donald Trump, Wilbur Ross The Associated Press
President Donald Trump gestures as he answers a question from a members of the the media after signing an Executive Order in the Roosevelt Room of the White House in Washington, Friday, April 28, 2017. The Executive Order directs the Interior Department to begin review of restrictive drilling policies for the outer-continental shelf.
The Associated Press
A protester rides in a mock coal train as other protesters demonstrate against trains carrying coal for export moving through Washington state in Tacoma, Wash. A coal-export terminal proposed in Washington state would increase cancer risk for some residents, make rail accidents more likely and add millions of metric tons of climate-changing greenhouse gas globally every year, according to an environmental study released Friday, April 28, 2017.
Melania Trump The Associated Press
First lady Melania Trump sits with a group of children to color and draw following a ribbon cutting ceremony and grand opening of the Bunny Mellon Healing garden at Children's National Hospital in Washington, Friday, April 28, 2017. The garden is dedicated to the first ladies of the United States.
The Associated Press
Rydapt. The Food and Drug Administration on Friday approved Rydapt for treating adults newly diagnosed with acute myeloid leukemia who have a genetic mutation called FLT3. Patients would take it along with chemotherapy. The drug, known chemically as midostaurin, is the first new medicine for acute myeloid leukemia in 25 years, according to the company. (Novartis via AP)
The Associated Press
Lisa Gao compares a new jet black iPhone 7, right, with her iPhone 6 at the Apple Store in Chicago. Qualcomm says Apple’s refusal to pay royalties related to technology used in smartphones will take a big bite out of its profit and revenue. Apple Inc. has sued Qualcomm, saying the chipmaker is abusing its control over essential technology and charging excessive licensing fees. Qualcomm says Apple has indicated that it won’t pay fees until the dispute is resolved. Representatives for the Cupertino, California-based iPhone did not immediately respond to a request for comment Friday, April 28, 2017.
The Associated Press
Conference workers speak in front of a demo booth at Facebook's annual F8 developer conference in San Jose, Calif. In a paper posted online on Thursday, April 27, Facebook security researchers said the company will monitor the efforts of those who try to hurt “civic discourse” on its service. It is also looking to identify fake accounts, and says it will notify people if their accounts have been targeted by cyber-attackers.
The Associated Press
In this artist rendering provided by Robots in Service of the Environment, a new robot that hunts the dangerous and invasive lionfish made its debut in Bermuda in April. It stuns lionfish with an electric current and then the fish is vacuumed into a container alive and it can later be sold for food. The robot caught 15 lionfish in 48 hours of initial testing. Handout photo courtesy of Robots In Service of the Environment. (Robots in Service of the Environment via AP
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A hill of coal at the North Omaha Station, a coal-burning power station, in Omaha, Neb. At the Trump administration's request, a federal appeals court agreed Friday to postpone a ruling on lawsuits challenging Obama-era restrictions on carbon emissions.
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A Nevada game warden displaying the carcasses and wings of two golden eagles and a hawk seized from an Arizona man accused of killing an eagle and illegally possessing raptor parts at the department's office in Elko. A two-year undercover operation in South Dakota has led to indictments against 15 people for illegally trafficking eagles and other migratory birds. The case in federal court in South Dakota offers a rare window into the black market for eagle feathers, parts and handicrafts. (Joe Doucette/Nevada Department of Wildlife via AP, File)
George H.W. Bush, George W. Bush The Associated Press
Former President George H.W. Bush, left, posing with his son former President George W. Bush at Houston Methodist Hospital in Houston where he was recovering from a mild case of pneumonia after being admitted on April 14. Bush spokesman Jim McGrath said in a statement Bush was discharged from the hospital on Friday, April 28, 2017. After the pneumonia was treated, Bush remained hospitalized due to chronic bronchitis. (Evan Sisley/Office of George H.W. Bush via AP, File)
The Associated Press
Residents of the Kisenso district of Kinshasa, receive yellow fever vaccines. The United States is facing a looming shortage of a yellow fever vaccine for travelers, potentially affecting hundreds of thousands who journey to countries where the deadly disease spreads. Doses of the one vaccine licensed in the U.S. will run out as early as next month, U.S. health officials said Friday, April 28, 2017. They said they are making arrangements to bring in another vaccine, licensed in Europe, on a limited basis.
Preview Image The Associated Press
Think Outside the Cage to Fight Invasive Species
Charmaine Yoest The Associated Press
Dr. Charmaine Yoest testifies on Capitol Hill in Washington. The White House says President Donald Trump is appointing Yoest, the former president of a leading anti-abortion organization to a senior position at the Health and Human Services Department.
T.J. Owuanibe, Roger Goodell The Associated Press
T.J. Owuanibe, 14, announces the Baltimore Ravens' selection during the first round of the 2017 NFL football draft, Thursday, April 27, 2017, in Philadelphia.
Harry Harris The Associated Press
U.S. Pacific Command Commander Adm. Harry Harris Jr. testifies on Capitol in Washington, Wednesday, April 26, 2017, before a House Armed Services Committee hearing on North Korea. America’s top Pacific commander is confident in the ability of a contentious U.S. missile defense system soon to operate in South Korea to shoot down North Korean missiles. But like nearly everything associated with the world’s last Cold War standoff the truth is muddier.
The Associated Press
A sign for the Department of Correction's Cummins Unit prison in Varner, Ark. Death-row inmate Kenneth Williams is scheduled to die at the prison unit Thursday, April 27, 2017, for the killing of a former deputy prison warden following an escape. If Williams is put to death, it would be the fourth execution for Arkansas since April 20.
Cecil Bell Jr. The Associated Press
Rep. Cecil Bell Jr., R-Magnolia works at his desk in the House Chamber at the Texas State Capitol, in Austin, Texas. Republicans control Congress and President Donald Trump has promised to drastically cut federal regulations, but for fiercely conservative Texas it may not be enough.