Samantha Raphelson

Over the past year, dockless electric scooters have descended on city sidewalks almost as if they fell from the sky. From Austin, Texas, to Denver to Cambridge, Mass., these compact two-wheelers are leading what researchers are calling the "micro-mobility revolution."

But their arrival has not been without controversy.

Updated at 6:22 p.m. ET

The 17-year-old who is accused of opening fire at a Texas high school on Friday, killing at least 10 people and wounding 13 others, has been charged with capital murder and aggravated assault.

Updated on Sunday at 10:00 a.m. ET

Hundreds of thousands of students, teachers, parents and victims rallied in Washington, D.C., and across the country on Saturday to demand tougher gun control measures, part of a wave of political activism among students and others impacted by school shootings.

As lawmakers in Washington consider a path forward on immigration policy, the debate is playing out along desolate stretches of the southwestern border where at least 7,209 people have died while crossing illegally over the past 20 years.

The recent arrest of an activist from the group No More Deaths is highlighting the rising number of people who die crossing the U.S.-Mexico border and the challenges that humanitarian workers confront when they try to help.

Updated at 1:07 p.m. ET

President Trump insisted Saturday that he is "a very stable genius," following the recent publication of a book that raises questions about his mental state and fitness for office.

Speaking to reporters at Camp David on Saturday, Trump called Michael Wolff, author of Fire and Fury: Inside The Trump White House, "a fraud" and reiterated his earlier claim on Twitter that Wolff is not trustworthy.

Many pet owners are aware of the dangers to dogs and cats in extreme heat, but the risks can be even greater during a cold snap.

The Douglas County Sheriff's office south of Denver says a suspect fired more than 100 rounds in a shooting that killed one police officer and wounded four others, along with two civilians, on Sunday morning.

The officers were shot after responding to an initial report of domestic violence at the Copper Canyon Apartments just after 5 a.m., Sheriff Tony Spurlock said in a news conference.

Author Peter Zheutlin never wanted a dog, let alone a rescue. He had always believed, as a lot of people do, that rescue dogs are damaged goods.

Now Zheutlin can't imagine life without a dog, and he's become so driven by the issue of stray dogs that he's written two books about it. He tells Here & Now's Lisa Mullins the number of stray dogs has "cascaded out of control" in some parts of the U.S.

Recovery efforts are ongoing in Houston from nearly $200 billion worth of damage caused by Hurricane Harvey in late August.

More than 100,000 homes were damaged in historic flooding, and thousands of residents are still living in hotels and rental housing while they wait for insurance checks.

The FBI's failure to unlock the cellphone of the Texas church shooter is reigniting the debate over encryption and government access to secured communications.

Earlier this week, FBI Special Agent Christopher Combs blamed the industry standard encryption for blocking investigators' ability to crack the PIN code on the gunman's device.

Software exists to thwart a passcode, but if forced, investigators run the risk of erasing all of the phone's data. The FBI sent the Texas gunman's phone to its lab in Quantico, Va., to try to determine another method.