This week on "Sunday Morning" (April 26)

The Emmy Award-winning "CBS News Sunday Morning" is broadcast on CBS Sundays beginning at 9:00 a.m. ET. "Sunday Morning" also streams on the CBS News app beginning at 11:00 a.m. ET. ( Download it here .) Hosted by Jane Pauley. WATCH THE FULL APRIL 26 EPISODE! HEADLINES: Washington shaken by shooting at White House press dinner (Video) In Washington Saturday night, guests at the White House Correspondents Association dinner were startled when shots were heard outside the ballroom where President Trump, first lady Melania Trump, and other top officials were attending. The alleged gunman, identified by law enforcement sources as 31-year-old Cole Allen of Torrance, California, was detained. CBS News' Tony Dokoupil, who was also at the dinner, describes the scene as Secret Service agents swept through. Next: Cuba? 08:20 COVER STORY: The long history of America's conflict with Cuba | Watch Video The small island nation of Cuba, just 90 miles from Florida, has played an outsized role in America's foreign policy for close to 70 years. Now, the Trump administration is blocking nearly all oil shipments from reaching the island, worsening its humanitarian crisis, with the president threatening he will be "taking Cuba." Correspondent Mo Rocca talks with history professor Jorge Malagon-Marquez about U.S. interventions in the past, and how tensions between Washington and Havana have even outlived the late dictator Fidel Castro. For more info: "Drift, 2020–22" by Jenny Saville. …