Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

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A marijuana bud displayed in Denver. Don't legalize pot, the pediatricians say, but don't lock teenagers up for using it, either. Seth McConnell/The Denver Post/Getty Images hide caption

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An up-close shot of Indian Prime Minister Narendra Modi's suit reveals its telltale lettering: his name, in stripes of gold down his jacket. Prakash Singh/AFP/Getty Images hide caption

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Varsity football captain Nahshon Ellerbe is a senior at Trinity Christian Academy in Addison, Texas. Jeffrey McWhorter/Trinity Christian Academy hide caption

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Protester chant slogans in downtown Cairo, Egypt, on Sunday to mark the fourth anniversary of of the 2011 uprising that toppled President Hosni Mubarak. Several people have been killed in clashes with security forces. Hassan Mohamed/AP hide caption

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Indian Prime Minister Narendra Modi and President Obama meet at Hyderabad House in New Delhi on Sunday, the first day of Obama's three-day trip to India. UPI/Landov hide caption

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A polar bear walks in the Arctic National Wildlife Refuge.The Obama administration is proposing new protections in the region that would ban mining and drilling. Subhankar Banerjee/AP hide caption

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Ukraine's president Petro Poroshenko speaks at a meeting of the National Security and Defense Council (NSDC) of Ukraine on Sunday. Mykola Lazarenko/ITAR-TASS/Landov hide caption

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Father Najeeb Michaeel shows off one of the many Christian manuscripts he saved from Iraq's Christian libraries. Alice Fordham/NPR hide caption

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The leader of Greece's left-wing Syriza party Alexis Tsipras casts his ballot in Athens on Sunday. His anti-austerity party was ahead in earlier polling. Aris Messinis/Getty Images hide caption

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Allison Begalman, a student at the University of Southern California, wears goggles and headphones to experience a virtual mortar strike on civilians in Aleppo, Syria. James Delahoussaye/NPR hide caption

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New England Patriots head coach Bill Belichick speaks during an NFL football news conference at Gillette Stadium, on Saturday in Foxborough, Mass. Belichick defended the team against allegations they had cheated by using underinflated footballs in a championship game. Steven Senne/AP hide caption

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An official stands in front of relief materials at a camp for displaced people in Maiduguri in Borno State last week. The town, where many have gathered after fleeing Boko Haram attacks, is now said to be under assault from the Islamist extremist group. Reuters/Landov hide caption

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