A powerful wave swept four crew members off a sailboat during a race near San Francisco, leaving one person dead and four others missing, the U.S. Coast Guard said early Sunday.

The eight-member crew aboard the 38-foot Low Speed Chase was participating in a yacht race from San Francisco Bay around the Farallon Islands on Saturday afternoon as their craft ran aground.

President Barack Obama might be noticing a familiar pattern. Whether it's allegations of Secret Service personnel consorting with prostitutes, candid moments caught live on microphones or launching bombs over Libya, his foreign trips seem to get overshadowed by distractions.

That's been the case on the coast of Colombia, where Obama will wrap up a weekend summit with a news conference that may well force him to confront the latest troubles — misconduct claims against Secret Service and military personnel assigned to make Cartagena secure for his visit.

Five people died when a tornado struck in and around the northwest Oklahoma town of Woodward early Sunday, one of a series of tornadoes that erupted across the Midwest and Plains over the weekend, U.S. authorities said.

Oklahoma Department of Emergency Management spokeswoman Keli Cain said early Sunday that state medical examiner's office had confirmed five fatalities in the Woodward area. Cain said she didn't know the gender or age of the victims or details of their death.

Cruise ship passengers and crew said prayers Sunday at the spot in the North Atlantic where the Titanic sank 100 years ago with the loss of more than 1,500 lives.

Passengers lined the decks of MS Balmoral, which has been retracing the route of the doomed voyage. After a moment of silence, three floral wreaths were cast onto the waves as the ship's whistle sounded in the dark.

Israel deployed hundreds of police Sunday at its main airport to detain activists flying in to protest the country's occupation of Palestinian areas, defying vigorous Israeli government efforts to block their arrival.

Police spokesman Micky Rosenfeld said hundreds of protesters were expected to land at Ben-Gurion International Airport in the course of the day. The police contingent at the airport was reinforced to deal with possible unrest or disruptions, he said.

Fascinated by the virtual nature of modern finance and currency swings, the California-based artist decided to meditate on monetary instability by exploring different physical characteristics of competing coins.

The result is the "Electrochemical Currency Exchange Co," an exhibition that opened Thursday and runs through the end of next week under New York's famous Rockefeller Plaza, named for American tycoon John D. Rockefeller.

Yahoo CEO Scott Thompson is expected to elaborate on his turnaround plans when the beleaguered Internet Company releases its first-quarter results.

WHAT TO WATCH FOR: The report, scheduled to be released after the stock market closes Tuesday, is expected to show Yahoo Inc. remains in a malaise that has been hobbling its stock for years.

The Texas Medical Board on Friday approved new rules on experimental stem cell therapies such as the one Gov. Rick Perry underwent during back surgery last year, despite objections they don't do enough to protect patients and could lead to an explosion of doctors promoting unproven, expensive treatments.

The rules require patients to give their consent, and a review board must approve the procedure before doctors use stem cell treatments.

A yellowfin tuna product used to make dishes like sushi and sashimi sold at restaurants and grocery stores has been linked with an outbreak of salmonella that has sickened more than 100 people in 20 states and the District of Columbia, federal health authorities said Friday.

The Food and Drug Administration said 116 illnesses have been reported, including 12 people who have been hospitalized. No deaths have been reported.

Thousands of Christian pilgrims are gathering in Jerusalem for an ancient fire ritual that celebrates Jesus' resurrection.

They have crowded Saturday into the Church of the Holy Sepulcher, where many Christian traditions hold that Jesus was crucified, buried and resurrected.