Former undercover agent Jay Dobyns says people can be forgiven for thinking Sunday's biker bloodbath in Waco, Texas, was a throwback to a bad 1970s movie.

The shootout — which killed nine people and wounded 18 — seemed aberrant because the public image of many motorcycle gangs has been burnished in recent years thanks to the many largely benign bike enthusiasts who've co-opted some of the same clothing and style.

The combination of global warming and shifting population means that by mid-century, there will be a huge increase in the number of Americans sweating through days that are extremely hot, a new study says.

People are migrating into areas — especially in the Southeast — where the heat is likely to increase more, said the authors of a study published Monday by the journal Nature Climate Change. The study highlighted the Houston-Dallas-San Antonio and Atlanta-Charlotte-Raleigh corridors as the places where the double whammy looks to be the biggest.

Mammograms at 40 or 50? Every year or every other year? What's the best colon check?

Screening for cancer has gotten more complicated in recent years with evolving guidelines that sometimes conflict. Now a U.S. doctors' group aims to ease some confusion — and encourage more discussion of testing's pros and cons — with what it calls advice on "high-value screening" for five types of tumors.

A federal appeals court has upheld a jury's finding that Samsung illegally copied some patented features in Apple's iPhone, but it sided with Samsung on one point that could reduce the $930 million in damages the South Korean company had been ordered to pay.

The ruling, coming three years after an epic courtroom battle between two tech industry giants, could mean yet another trial over a portion of damages representing more than a third of the total award. Legal experts, however, say the rivals may be more inclined to negotiate a settlement this time around.

A South Texas woman has given birth to triplet girls, with two of the babies conjoined at the pelvis.

Dr. Haroon Patel, a pediatric surgeon at Driscoll Children's Hospital in Corpus Christi, said Monday that it will likely be at least six months until the conjoined babies, who share a colon, will be separated.

Nissan Motor Co. will have vehicles packed with autonomous driving technology by 2020 but whether people will be able to drive them on roads is up to government regulators, Chief Executive Carlos Ghosn said Monday.

Many of the world's automakers, and companies outside the auto industry such as Google, are working on technologies that allow cars to navigate without human intervention.

The owner of fashion brands Gucci and Yves Saint Laurent has accused Alibaba Group in a lawsuit of profiting from sales of counterfeit goods despite the Chinese e-commerce giant's pledge to combat the trade in fakes.

The lawsuit filed by France's Kering SA and a group of its brands in a New York court is a setback for Alibaba's effort to reassure companies and regulators it is taking effective action to keep counterfeit goods off its online sales platforms.

The case of a Florida woman who fled to avoid her son's circumcision is entering a federal courtroom for the first time.

Thirty-one-year-old Heather Hironimus was arrested Thursday in the long-running dispute over the removal of her 4-year-old child's foreskin. She went missing with the boy nearly three months ago and ignored a judge's warnings that if she didn't appear in court and give consent for the circumcision to proceed, she faced jail.

One of the largest U.S. egg producers has said it will destroy 2 million egg-laying hens in the central state of Minnesota due to a deadly bird flu virus.

The development at the Minnesota chicken farm brings the total of affected birds to 35 million in 15 states, with Minnesota and Iowa poultry flocks hit the hardest.

A U.S. Marine Corps Osprey aircraft made a hard landing in Hawaii on Sunday, killing one Marine and sending 21 other people to hospitals as dark smoke from the resulting fire billowed into the sky.

The tilt-rotor MV-22 Osprey, which can take off and land like a helicopter but flies like an airplane, had a "hard-landing mishap" at about 11:40 a.m., the 15th Marine Expeditionary Unit said in a statement.