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Ecuadorians will choose a new president Sunday, less than two weeks after the South American country was shaken by the assassination of one of the candidates.

As world leaders meet in Glasgow, Scotland, to try to ramp up efforts to curb climate change, the future of polar bears looms over them.

The Arctic is warming three times faster than the rest of the Earth and it's on the knife edge of survival.

A coroner in Wyoming says slain cross-country traveler Gabby Petito was strangled.

The family of slain traveler Gabby Petito has implored the public and news media to put the same energy into helping find other missing people as they did Petito, a 22-year-old woman who vanished on a cross-country trip with her boyfriend.

– Political groups fighting for control of the U.S. Senate have poured more than $118 million into the contest between Montana's Democratic Gov. And the Montana political ad spending is almost 10 times as much per voter being spent on ads in Colorado's Senate contest between former Democratic Gov. But the main driver is the race's competitive nature and the high stakes in the Senate. “These groups that are spending, they're spending big," Bullock told The AP. The Annenberg center's Jamieson, whose grandmother homesteaded in Montana, noted that political ads have a long history in the state.

It's a shift Montana Democrats argue is out of step with the state’s independent-minded electorate. Steve Bullock, challenging Daines, is one of the Democrats' best hopes to tilt the balance of power in the closely divided Senate. Gianforte, one of the wealthiest members of the U.S. House, has been boosted in his run for Montana governor by Daines’ clout. Democrats as recently as 2014 held both Montana U.S. Senate seats, the governor’s mansion and a bevy of other statewide offices. Daines and Gianforte “fit the party like a glove right now,” University of Montana political analyst Rob Saldin said.

Steve Bullock speaks at an event marking a conservation agreement at a former mining site in Jardine, Mont. Steve Bullock never got to square off directly against President Donald Trump before dropping out of the Democratic presidential primary race last year. But the two-term governor is getting another chance on his home turf by trying to oust a strong Trump ally, first-term Republican Sen. Steve Daines in Montana's U.S. Senate race. Steve Bullock never got to square off against President Donald Trump before dropping out of the Democratic presidential primary last year, but the two-term governor is getting another chance on his home turf by trying to oust a strong Trump ally in Montana's U.S. Senate race. To hear Bullock tell it, he doesn't see the Senate race as an extension of his presidential run or Daines as a proxy of Trump.

The Making of a Crime FighterJohn Walsh is gaining recognition as the face of parents of missing children everywhere. He's assigned to dig back into the Adam Walsh case. As far as evidence-wise, anything-wise, as far as the Adam Walsh case from 1991." In an interview with The Florida Files, Hicks talks about getting those files. -----------------------------------------------------------------------------------------------------------------------------------------Video vault and audio archive for The Florida Files from WPLG-TV, Local 10 News archives, Miami Dade College's Wolfson Archives and ABC News.