KNOW IT ALL: Monday's Top Stories at NBC News

Breaking News Emails

Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.

Good morning, and happy Monday. Here are some of the stories we're following today:

1. Sub dives below the surface to scour for missing jet

The search for the lost Malaysia Airlines jet will go underwater starting Monday. Unable to find any debris on the surface or reacquire further pings from the deep, searchers were set to launch the Bluefin 21 autonomous underwater vehicle at 5 a.m. ET to build a sonar map of the seafloor. Read more in NEWS.

2. KKK leader suspected of deadly attack on Jewish centers

The 73-year-old suspected of killing a 14-year-old Eagle Scout and his grandfather at a Jewish center and then a woman at a Jewish nursing home in Kansas was a Ku Klux Klan leader and has a history of anti-Semitism and racism. A civil rights organization that tracks hate groups said it has long known about the man, who uses several aliases. Read more in NEWS.

3. Pistorius grilled on stand again

Prosecutor Gerrie Nel tried to prove that Oscar Pistorius gave false testimony during his defense by arguing that the Olympian's girlfriend had food in her stomach even though Pistorius testified they had eaten hours before they went to bed. Pistorius, 27, is accused of premeditated murder but insists that he killed his girlfriend after mistaking her for an intruder. Read more in NEWS.

4. Deadline up for Russians to flee Ukraine government buildings

Acting President Oleksandr Turchynov issued a decree Sunday that Russian protesters must disarm and vacate government offices in several cities in the east of the country, but at least a hundred pro-Russian separatists attacked and took over the police headquarters in the city of Horlivka on Monday in defiance of the order. Read more in NEWS.

5. Teachers return to site of stabbing spree this morning

The Pennsylvania school where 22 were injured when a student allegedly stabbed classmates and a security guard will reopen to teachers on Monday. On Tuesday, the students will be given the opportunity to walk through the hallways with their families and on Wednesday classes will resume, one week after the violence. Read more in NEWS.

The community supported students and staff by placing flowers, balloons and stuffed animals at the entrance of Franklin Regional High in the days following the attack:

6. Hubba Bubba: Watson rolls to second green jacket

The stage was set for a wild finish for the ages at the Masters, but Bubba Watson drained all the drama by dominating the back 9. The long-hitting Watson won his second green jacket in three years. Read more in SPORTS.

And in true Southern style, Bubba celebrated his win at the waffle house:

7. Stars let their hair down at MTV Movie Awards

Awards season lived on Sunday night as Hollywood's stars took to the stage again for the MTV Movie Awards. "The Hunger Games: Catching Fire" took home movie of the year, but a couple moments of the night were a bit unpredictable. Read more in ENTERTAINMENT.

… What’s trending today?

If you forgot that tomorrow is tax day, it's probably high time to take a personal day and get all that paperwork organized. If there's one thing though Americans dread more than April 15, it's the possible audit (cue "Jaws" music). This year though, Americans can relax a little because, after budget cuts, the IRS will be doing less audits. This does not give you an excuse to purposefully lie about deductions — that's still fraud.