BusinessInsider.com: on Homeland Security

Bill Weld: Lesson of Iraq War: train Saudis, but no US troops there

WELD: One of the things that troubles me about Trump in the foreign area is he claims to be a non-interventionist but he's awful quick on sending those troops. A couple of months ago he said, "I'm sending 5,000 more troops to the Middle East immediately." Well, they never got there because they must have had a second thought. And he never said what it was for. I'm not quite clear why we're sending troops to Saudi Arabia to defend their oil supplies. Don't they have any troops over there? I know they have a lot of weapons--because we sold them all to Saudi Arabia--but maybe we should make sure they know how to fly those planes and fire those missiles. I just I don't get it. Boots on the ground to another country for regime change or to correct something that we see in the other country that we don't like? That's the height of the lessons we learned from the Iraq war --we shouldn't do that.

Joe Walsh: Supports military service for gays and transgendered

Andrew Yang: I'd love to declassify Area 51, for government transparency

Yang's statement comes in response to a viral Facebook event to "storm Area 51" and "see them aliens," with 1.7 million people marked "going" on Facebook, and another 1.3 million indicating interest on the Sept. 20 event.

The joke even reached the attention of the US Air Force, prompting a warning to the potential participants to stay away from the military base: "The Nevada Test and Training Range is an area where the Air Force tests and trains combat aircraft. Any attempt to illegally access military training areas is dangerous."

Jim Bridenstine: Intentional explosions in space pose risk to all spaceflight

India destroyed one of its satellites with a missile last week, a move the Indian Prime Minister welcomed as one that established India "as a space power." But NASA Administrator Jim Bridenstine said that it posed an "unacceptable" threat to astronauts on board the ISS.

"What we are tracking right now, objects 4 inches or bigger --about 60 pieces have been tracked," he said. He said 24 of those pieces were traveling above the ISS, even though the satellite had been orbiting 185 miles above the Earth, lower than the station, which orbits roughly 250 miles above the Earth. "That is a terrible, terrible thing to create an event that sends debris at an apogee that goes above the International Space Station," Bridenstine added. "That kind of activity is not compatible with the future of human spaceflight."