'Nightline' Daily Line, Sept. 13: Protests Spread to Sana'a, Cairo

6:47 p.m. ET: ABC's Dan Harris tweets:

Credit: Dan Harris/Twitter

4:16 p.m. ET: UPDATE: A U.S. intelligence bulletin warned today that the violent outrage aimed at U.S. embassies spawned by a movie mocking the Prophet Mohammed could be spread to America by extremist groups eager to "exploit anger."

Read the developing story HERE

2:36 p.m. ET: It's a bird, it's a plane, it's… a missle? Or two…

Credit: ABC

ABC's Clayton Sandell reports that the bright trails of two missiles on a collision course lit up the early morning western sky Thursday, prompting concerned calls to police and TV stations across at least five states.

Read the full story HERE

12:40 p.m. ET: BREAKING: The Federal Reserve announced its highly-anticipated quantitative easing, or its so-called QE3, purchasing additional agency mortgage-backed securities at a pace of $40 billion per month in another effort to stimulate the struggling economy.

Read the full story HERE

Chairman of the US Federal Reserve Ben Bernanke arrives at the Federal Reserve in Washington, Aug. 7, 2012. (Saul Loeb/AFP/Getty Images)

10:02 a.m. ET: DEVELOPING: Outrage over the film "Innocence of Muslims" that denigrated the Prophet Mohammad spread Thursday to Yemen, where thousands of protesters rushed the U.S. Embassy in Sana'a, while more demonstrations erupted outside the U.S. Embassy in Cairo.

Keep checking back HERE for the latest

Credit: AP Photo