Iran is denying giving rebels in Yemen the missile they fired into Saudi Arabia on Tuesday.
The Houthis' Missile Forces took credit for launching a Burkan H2 missile at Saudi Arabia's capital. The question is how they got it.
Last week, U.S. Ambassador to the United Nations Nikki Haley accused Iran of supplying missile parts to Houthi rebels.
On Tuesday, Haley said the latest missile launch "bears all the hallmarks of previous attacks using Iranian-provided weapons."
On Wednesday, Iran said it would file a U.N. complaint against the U.S. for its accusations.