- The US and UK launched retaliatory strikes against Houthi rebels in Yemen on Thursday.
- The strikes come after the Iran-backed rebel group conducted dozens of attacks on commercial ships.
- But a military strategist said more strikes will likely be necessary to deter the Houthis.
The US will likely have to conduct a series of strikes against Yemen's Houthi rebels in the coming days or weeks if it wants to substantially impact the militant group's capabilities, a military expert told Business Insider.