Jon Gambrell, The Associated Press DUBAI, United Arab Emirates (AP) — Yemen's Houthi rebels vowed fierce retaliation Friday for American and British strikes against them, further raising the prospect of a wider conflict in a region already beset by Israel’s war in Gaza. The bombardment — launched in response to a recent campaign of drone and missile attacks on commercial ships in the vital Red Sea — killed at least five people and wounded six, the Houthis said. As the bombing lit the predawn sky over multiple sites held by the Iranian-backed rebels, it forced the world to again focus…