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KNOW IT ALL: Friday's Top 7 Stories at NBC News

From international help in fighting the Western U.S. wildfires to North Korea on , here are the stories we're following.

Good morning. Here are some of the stories we're following today:

1. Experts From Australia Will Help U.S. Firefighters

More than 70 firefighting specialists from Australia and New Zealand are traveling to America to help tackle deadly wildfires across the West. Three firefighters who died in Washington state this week were identified Thursday. Read more in NEWS.

2. Has Trump Forced Bush to Change Tune on Immigration?

GOP presidential candidate Jeb Bush has been using the terms "sanctuary cities" and "anchor babies" as part of his campaign lexicon, raising questions about whether he's trying to appeal to the same anti-immigrant voters as front-runner Donald Trump. Read more in POLITICS.

3. North Korea Moves to ‘Brink of War’ Over Loudspeaker

North Korea's Kim Jong Un ordered his troops to enter a "wartime state" Friday and warned of military action unless South Korea stops blaring anti-Pyongyang propaganda over loudspeakers. The standoff came after the North Korean military allegedly fired a projectile at a loudspeaker on Thursday. Read more in NEWS.

4. First Female Ranger Graduates Were Thinking of Future

Capt. Kristen Griest and 1st Lt. Shaye Haver, the first two women to ever graduate from the Army's notoriously demanding Ranger school, say they were motivated to get through the punishing 62-day course because of the doors they would open for other women. Read more in NEWS.

5. Prep School Rape Accuser Breaks Down on Stand

A girl who says she was raped at an elite New England prep school broke down on the witness stand Thursday after her alleged attacker's lawyer suggested there were inconsistencies in how she described the circumstances surrounding her encounter with the older student. Read more in NEWS.

6. Caitlyn Jenner Could Face Charges in Fatal Car Crash

The former Olympian could face a manslaughter charge in a fatal February car crash in California after investigators determined she was driving too fast. The four-vehicle crash left a woman dead, and authorities found that Jenner's speed was a factor in the crash considering the existing traffic conditions. Read more in NEWS.

7. Why Martin Scorsese’s New Film Could Help Destroy Guns

British artist Carl McCrow is asking movie producers to donate money to his registered charity "One Less Gun" to help decommission weapons left behind in former war zones. His first taker? "Tomorrow," a film executive produced by Oscar-winner Martin Scorsese that will be released later this year. Read more in POP CULTURE.

Nightly Spotlight

Former President Jimmy Carter says he has melanoma that has spread to his liver and brain — but he's fighting it with a drug so promising that its approval was fast-tracked last year.