The U.S. is spending billions improving its defenses — primarily by building more capacity into its constellations and improving its tracking abilities. A $900m contract was awarded to Lockheed Martin in 2014 to develop a radar system capable of tracking objects as small as baseballs in space in real time. But there are also hints that the U.S. may be looking to equip its satellites with active defenses and countermeasures of their own, such as jamming devices and the ability to evade interceptions. A purely offensive anti-satellite program is in fast development as well. High-energy weapons and maneuverable orbiters such as space planes all open the possibility of the U.S. being able to rapidly weaponize the domain beyond the atmosphere, should it feel the need to do so.
This decision might be a lobbying effort by ULA to force Congress to give them additional waivers on using the Atlas 5 engine. Or they could be realizing they wouldn't be able to match SpaceX's price, and decided it was pointless wasting time and money putting together a bid. Either way, the decision suggests ULA is definitely challenged in its competition with SpaceX, and until it gets a new, lower cost rocket that is not dependent on Russian engines, its ability to compete in the launch market will be seriously hampered.
In a potential battlefield application, the microwaves would heat the suspect area, causing the muddy ground to expand and thus squeeze the plastic (abstract). Pulsing the microwaves would generate a series of ultrasound pressure waves that could be detected and interpreted to disclose the presence of buried plastic explosives. Solving the technical challenges of detecting ultrasound after it left the ground gave the Stanford researchers the experience to take aim at their ultimate goal – using the device in medical applications without touching the skin.
The summit sought to address whether shooting down a drone might escalate tensions between countries or whether drones changed the character of a conflict by giving actors capabilities they didn't have before. As more and more state and non-state actors acquire drones, the war game illustrated how drones could be used in creative ways to further political or military objectives (PDF).