The Air Force is resurrecting its boost-glide missile program, one of two hypersonic concepts the service is developing, Defense One ’s Patrick Tucker reported Thursday. It gets its name because it reaches near-space altitudes using a rocket booster, then glides back to Earth at speeds exceeding five times the speed of sound.

The missile is known as an AGM-183A Air-Launched Rapid Response Weapon, or ARRW, and it’s an effort first launched to much fanfare in August 2018—only to see mixed results in testing and ultimately lose support from service leadership amid investment in alternative missiles.

So why is ARRW back? Tom Karako, director of the Missile Defense Project at the Center for Strategic and International Studies, said both missile types have advantages, which is why Chi

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