Houthi rebels are brandishing increasingly sophisticated weapons, including missiles that "can do things that are just amazing," the Pentagon's chief weapons buyer said at an Axios event.

The big picture: The militant group has for a year used drones and missiles to strangle waters off Yemen, disrupting international shipping.

• Under Secretary of Defense for Acquisition and Sustainment Bill LaPlante on Wednesday said the Houthis "are getting scary."
• "I'm an engineer and a physicist, and I've been around missiles my whole career," he said at the Future of Defense summit in Washington, DC. "What I've seen of what the Houthis have done in the last six months is something that — I'm just shocked."

State of play: The group's forces menace almost every ship passing by — civilian or military — and have even sent some to the seafloor.