5 Things to Know This Morning

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

1. Brooklyn Bridge White Flag Mystery Deepens: Cops Don't Know Who Did It

The mystery surrounding two white flags that appeared on top of the Brooklyn Bridge deepened as the New York City Police Department admitted they don't know who committed the security breach or how they accomplished it.

White flags, which are symbols of surrender, flew from poles on the stone supports atop the famed bridge that connects Brooklyn and Manhattan over the East River.

"I'm not particularly happy about the event," said NYPD Commissioner Bill Bratton.

2. The Slow, Sad Journey Home for Victims of Malaysia Airlines Tragedy

The bodies of victims from last week’s Malaysia Airlines tragedy are headed home, being flown to the Netherlands as the Dutch government declared a day of national mourning.

Meanwhile, the black boxes from MH17 were delivered to the UK’s Air Accidents Investigation Branch (AAIB) headquarters at Farnborough, a spokesman tells ABC News. Investigators expect to be able to download the info from the recorders within 24 hours. There is no significant damage to them.

Ukraine prepared a departure ceremony at the airport in Kharkiv for the passengers and crew of Flight MH17, which was shot down Thursday with 298 people on board, most of them Dutch citizens.

3. Where Was Missing Teen Abigail Hernandez for the Past 9 Months?

Questions surround the return of a teenage girl who disappeared on her walk home from school nine months ago.

Abigail Hernandez vanished when she left her school in Conway, New Hampshire, on Oct. 9 and, aside from one letter to her mother this winter, there had been no indication by officials that there was any trace of her until she was reunited with her parents on Sunday.

Investigators were remaining tight-lipped about the 15-year-old's return, refusing to even say how the girl was reunited with her mother, Zenya Hernandez.

4. Vandals in Oregon Pelting Cars With Doughnuts, Chocolate Bars

It’s a sticky crime.

Somebody in Hillsboro, Oregon has been pelting cars and smearing windows with pastries, according to ABC affiliate KATU.

“I’m this close to putting up surveillance cameras,” resident Carl Davis said. “If it happens again, I probably will.”

5. Whitney Houston's Mother Cissy Slams Upcoming Biopic

Cissy Houston, 80, is not happy about Lifetime's upcoming biopic about her late daughter.

Whitney Houston's mother spoke to Entertainment Tonight on Tuesday and begged the network and anyone else listening to "please let her rest."

"Lifetime has chosen to go ahead with the movie about Whitney in spite of my family's objections," she told ET in a statement. "No one connected with this movie knew Whitney or anything about her relationship with Bobby."