5 Things to Know This Morning

— -- Your look at the five biggest and most buzz-worthy stories of the morning.

1. First Ebola Case in US, But CDC Vows 'We Will Stop It Here'

The first Ebola case has been diagnosed in the United States, but a top health official said today there is "no doubt... we will stop it here."

Dr. Tom Frieden, the director of the Centers for Disease Control and Prevention, said the patient left Liberia on Sept 19 and arrived in the U.S. on Sept. 20. The patient sought medical help on Sept. 27 and was put in isolation on Sept. 28, Frieden said.

Tests confirming the Ebola diagnosis came back Tuesday. The White House said President Obama was briefed about the patient by Frieden.

2. Breast Cancer Awareness Month

Today marks the start of Breast Cancer Awareness Month, an opportunity to discuss disease prevention and treatment.

ABC News is going pink to mark the occasion, with coverage -- and a pledge -- devoted to the topic.

3. Obama Rode Elevator With Armed Man With Criminal Record, Sources Say

President Obama rode an elevator with an armed security contractor who had a criminal record during a recent visit to the Centers for Disease Control and Prevention, according to a source with knowledge of the situation.

The man was flagged because he was taking pictures and acting somewhat unprofessional in the elevator with the president during the Sept. 16 visit, the source said.

At that point, the Secret Service ran a check on the man and found that he had a criminal record, the source said.

While the president was apparently in no danger, the situation marks the latest in a series of incidents that have raised criticism about the functioning of the Secret Service, and comes the same day as a Congressional hearing into how a man pierced layers of Secret Service Security at the White House.

4. Bell Gardens, California, Mayor Daniel Crespo Shot, Killed at Home

Bell Gardens, Calif., Mayor Daniel Crespo was fatally shot at his home Tuesday afternoon in what appeared to be a domestic dispute with his wife, Los Angeles County sheriff's officials said.

The mayor, 45, was shot at a gated complex in the 6300 block of East Gage Avenue shortly after 2:30 p.m. He was transported to a local hospital, where he was later pronounced dead, according to a statement from the Los Angeles County Sheriff's Department.

"Daniel Crespo Sr. became involved in an argument with his wife, Levette Crespo. Their 19-year-old son, Daniel Crespo Jr. tried to intervene and ultimately became involved in a physical altercation with Daniel Crespo Sr. During that time, Levette Crespo produced a firearm and shot her husband multiple times in the torso," according to the statement.

5. Kansas City Royals Party Like It's 1985

The Kansas City Royals have been waiting for this since the 1980s.

The energy. The buzz. The heart-pounding moments. Baseball in October.

And somehow, some way, the Royals prevailed, rallying against the Oakland Athletics to win 9-8 in the 12th inning of Tuesday’s American League wild-card game.