Below is a series of questions that I have been asked frequently and preliminary answers. The facts remain incomplete, so these are preliminary thoughts. In the wake of the shooting of the Dallas police officers Thursday night during a peaceful protest, police cornered the shooter -- Micah Xavier Johnson -- in a parking garage. After an hours-long standoff that included exchanges of gunfire, they used a robot to deliver an explosive that killed the gunman. "We saw no other option but to use our bomb robot and place a device on its extension for it to detonate where the subject was," Dallas Police Chief David Brown said at a news conference Friday morning.

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Following the tragic deaths of five police officers in Dallas, Texas, during a rally for Alton Sterling and Philando Castile on Thursday night, the Dallas Police Department deployed a small robot designed to investigate and safely discharge explosives. Officers attached a bomb to the robot ad hoc-style -- detonating it and killing the sniper while keeping the investigators out of harm's way. According to companies that manufacture bomb-disposal robots interviewed by The Intercept, none were aware of their bots ever being turned into lethal weapons, though one company acknowledged the robots could be adapted to hold weapons. A spokesperson from Pedsco, a company in Canada that supplies robots to other jurisdictions in Texas, confirmed that he did not "know of any instances of an explosive used to disable a suspect" attached to a robot owned by law enforcement. Pedsco would not comment on its own robots, citing possible confidentiality conflicts with customers, but pointed to instances where explosive ordnance disposal robots had been used offensively, such as a 1993 case where Prince George's County Police Department deployed a water cannon attached to a robot to disarm a suspect hiding in a closet.

"Really, we're building collision avoidance for industrial drones," said Alexander Harmsen, CEO and co-founder of Iris Automation. "We see this huge need for industrial drones for mining exploration, pipeline inspection, agricultural surveying, forestry, or even package delivery." Without a way to avoid mid-air collisions, drones risk crashing into a Cessna, a flock of geese or a 747. Worst case scenario: a drone gets sucked into a jet engine causing catastrophic engine failure as high-velocity bits of metal penetrate fuel tanks, hydraulic lines and the cabin. Iris Automation's solution is an AI computer that blends real-time images and 3D maps to track incoming objects.

Havoc broke out at a peaceful protest against police violence and racism in Dallas on Thursday evening when a sniper opened fire, shooting 12 officers and 2 civilians. Police cornered the suspect, now known to be Micah Johnson, in a downtown parking garage around 11 p.m. As negotiators tried to talk him out of the parking deck over a series of hours, news came out that five of the officers had died. Negotiations broke down; gunfire was exchanged between police and Mr. Johnson. Then, around 3 a.m., police reported that the sniper was dead.

"Really, we're building collision avoidance for industrial drones," said Alexander Harmsen, CEO and co-founder of Iris Automation. "We see this huge need for industrial drones for mining exploration, pipeline inspection, agricultural surveying, forestry, or even package delivery." Without a way to avoid mid-air collisions, drones risk crashing into a Cessna, a flock of geese or a 747. Worst case scenario: a drone gets sucked into a jet engine causing catastrophic engine failure as high-velocity bits of metal penetrate fuel tanks, hydraulic lines and the cabin. Iris Automation's solution is an AI computer that blends real-time images and 3D maps to track incoming objects.

A 13-year-old in California shook her head at the TV. A 5-year-old in Pittsburgh asked her father why people are so angry. As America coped with one tragic moment after another this week, with the deaths of Alton Sterling and Philando Castile followed by the shooting of a dozen police officers in Dallas, the country's parents had an added task: explaining each act of violence to their children. "If [children] see a bunch of this on television, they can become the indirect victims of trauma," said Suzanne Silverstein, director of the Cedars-Sinai Psychological Trauma Center. African American children might be afraid for their own lives or for their friends and families when they see black men being shot.

Two recent accidents involving Tesla's Autopilot system may raise questions about how computer systems based on learning should be validated and investigated when something goes wrong. A fatal Tesla accident in Florida last month occurred when a Model S controlled by Autopilot crashed into a truck that the automated system failed to spot. Tesla tells drivers to pay attention to the road while using Autopilot, and explains in a disclaimer that the system may struggle in bright sunlight. Today the National Highway Traffic Safety Administration said it was investigating another accident in Pennsylvania last week where a Model X hit the barriers on both sides of a highway and overturned. The driver said his car was operating in Autopilot mode at the time.

Today on In Case You Missed It: Stanford engineers are using a robot to understand the way humans move through a crowded space. University of California, San Diego researchers are using the world's largest outdoor shake table to simulate earthquakes and fire to a six story building. If you can get into topics unrelated to Dallas and police shootings this weekend, German churches are using wifi to try to lure new attendees. As always, please share any interesting tech or science videos you find by using the #ICYMI hashtag on Twitter for @mskerryd.

Bringing bloody resolution to a standoff with the suspected shooter in Thursday's horrific sniper attack on police at a Black Lives Matter protest, Dallas Police cornered and killed the suspect in a parking garage with an explosive delivered by a bomb-disposal robot. The AP quotes robotics expert Peter W. Singer at the New America Foundation as saying that, to his knowledge, this is the first instance in the United States of police killing someone with a robot. In a statement given on Friday, Police Chief David Brown said that the robot was deployed after several hours of failed negotiations and an exchange of fire at the El Centro College parking structure where the suspect was found. "We saw no other option but to use our bomb robot and place a device on its extension for it to detonate where the suspect was," said Brown. "Other options would have exposed our officers to great danger. The suspect is deceased as a result of detonating the bomb."