Nestled among turquoise blue waterfalls and cottonwood trees, the tiny Havasupai reservation is only accessible by foot, by mule or by helicopter. It's a five-minute flight from the rim of the Grand Canyon to Supai Village on the canyon floor, where 450 tribal members live in small homes made of panel siding and materials that can be easily hauled or lifted in.

It's no wonder Internet access has been a challenge. But recently, the Havasupai have had some help from the Oakland-based nonprofit MuralNet.

The price of oil saw a massive price spike Monday following drone strikes on a Saudi oil facility over the weekend that has shut off more than half of the kingdom's daily exports, or about 5% of the world's crude production.

Benchmark Brent crude briefly surged almost 20% in early trading before settling to 10% higher, up $6 to $66.28, according to The Associated Press. The U.S. benchmark West Texas crude was up 9%.

Purdue Pharma, the maker of OxyContin, filed for Chapter 11 bankruptcy protection Sunday night, just days after striking a settlement with more than 2,000 local governments over its alleged role in creating and sustaining the deadly opioid crisis.

New York Gov. Andrew Cuomo said Sunday he will push for a ban on some e-cigarettes amid a health scare linked to vaping — a move that would follow a similar ban enacted by Michigan and a call from President Trump for a federal prohibition on certain vaping products.

Updated at 11:30 p.m. ET

Iran says it is not behind Saturday's drone attacks on oil plants in Saudi Arabia, denying accusations from Secretary of State Mike Pompeo that Tehran was responsible for "an unprecedented attack on the world's energy supply."

Javad Zarif, Iran's foreign minister, said in a tweet on Sunday that Pompeo was turning from "max pressure" to "max deceit."

Farmers in the rural Midwest say they are struggling because of President Trump's ongoing trade war and a recent decision the president made on renewable fuels made from corn and soybeans that benefits the oil industry.

"We're tightening our belt," farmer Aaron Lehman says while driving his tractor down a rural road near his farm north of Des Moines, Iowa. "We're talking to our lenders, our landlords [and] our input suppliers."

Updated at 12:45 a.m. ET Monday

The United Auto Workers began a nationwide strike just before midnight on Sunday at General Motors after both sides failed to agree on a new contract over issues including wages, health care and profit-sharing.

Production across the U.S. is expected to be halted until a new contract is hammered out, affecting nearly 50,000 workers at 33 manufacturing plants in nine states as well as 22 parts distribution warehouses.