Animals that live in the ocean communicate with sound — humpback whales, for example. But these voices could soon be drowned out by powerful sonic booms from vessels searching for oil and gas.

Sunday afternoon, Cameron Kasky is doing push-ups in a park near Marjory Stoneman Douglas High School. Kasky, a junior, says kids like himself are doing something new, demanding a fresh look at America's gun laws.

"The crescendo has hit its point. It's enough and it's over," he says. "I haven't got a shred of doubt that this is going to be our change."

Black Panther pounced on the weekend box office, breaking cultural barriers and earning the highest debut ever for a February film, with an estimated three-day domestic gross of $192 million, said Disney, Marvel's parent company.

The opening was the fifth highest-earning of any film, according to Disney. The only other movies that have brought in more are Star Wars: The Force Awakens, Star Wars: The Last Jedi, Jurassic World and The Avengers, according to The Associated Press.

Last week was supposed to be a pivotal moment for an immigration deal. But despite days of debate and numerous proposals, senators were not able to pass a concrete immigration solution.

Four separate immigration measures failed in the Senate.

Beer has fueled a lot of bad ideas. But on a Friday afternoon in 2007, it helped two Alzheimer's researchers come up with a really a good one.

In the height of ski season this year, blades of grass and patches of dirt still dot cross country ski trails in Aspen, Colo. Conditions like this present a conundrum for professional skiers: Their livelihood relies on snow and cold temperatures, but essentials like travel and snow-making come with an environmental cost.

Could anyone have stopped this? That's one of the biggest questions for schools and educators as the nation takes in the facts of the shooting in Parkland, Fla., that has left 17 dead and 23 injured.

Updated at 7 p.m. ET

Court documents say the suspect in the shootings at a South Florida high school has confessed to investigators. Nikolas Cruz, 19, has been booked on 17 charges of premeditated murder at Broward County's Main Jail in Fort Lauderdale, Fla.

Addressing the nation after Wednesday's Florida school shooting that left 17 people dead, President Trump said no child or teacher "should ever be in danger in an American school."

He said he will meet with governors and attorneys general to deal with the issue of mental health.

Speaking from the White House, Trump said it was "not enough to simply take actions that make us feel we are making a difference, we must actually make that difference."

Updated at 2:40 a.m. ET on Thursday

The Broward Sheriff's Office has identified the suspect in Wednesday's deadly school shooting as 19-year-old Nikolas Cruz, a former student who had been expelled for disciplinary reasons. Law enforcement says Cruz carried out the attack that killed at least 17 people at Marjory Stoneman Douglas High School and left others hospitalized with gunshot wounds.

Cruz is now in police custody after briefly receiving treatment at a local hospital.