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

Image: Brazilans demonstrate in favor of the impeachment of President Dilma Rousseff in front of the Brazilian National congress in Brasilia
Brazilans demonstrate in favor of the impeachment of President Dilma Rousseff in front of the Brazilian National congress in Brasilia.PAULO WHITAKER / Reuters

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Good morning. Here are some of the headlines we're following this morning:

1. What to Know About Ryan’s Meeting With Trump

House Speaker Paul Ryan and Donald Trump will begin a conversation they hope will end with a unified Republican Party when the presumptive GOP nominee visits Washington on Thursday. Read more in POLITICS.

2. Sanders Weakened Heading Into Golden State

Despite notching two wins this month, with more likely to come, Democratic presidential contender Bernie Sanders is running lower on cash than expected and replaced his top official in California on Wednesday. Read more in POLITICS.

3. ‘Criminal Act’ Ruling Deepens Mystery in Blast

Federal investigators opened a captivating new chapter in a deadly West, Texas, fertilizer plant explosion when they announced that someone deliberately set the fire that sparked it three years ago. But, as with many mysteries, the revelation raises more urgent questions. Read more in NEWS.

4. Debris Pieces ‘Almost Certainly’ From MH370

Malaysia's government said Thursday that two more pieces of debris, discovered in South Africa and Rodrigues Island off Mauritius, were "almost certainly" from the missing Malaysian airliner. Read more in NEWS.

5. Brazil Senate Votes to Impeach President

Brazil's Senate voted early Thursday to impeach President Dilma Rousseff amid the worst economic crisis there since the 1930s and with only 85 days to go until the Rio Olympics. Read more in NEWS.

6. Trial to Begin for Officer in Freddie Gray Case

The second trial in the Gray case gets under way Thursday, and it will be different than the one that ended last year with a hung jury. This trial is before a judge, and it has a better chance of ending with a verdict. Read more at NBC WASHINGTON.

7. Why Chinese Cops Now Patrol Italian Streets

Chinese tourists at Rome's Colosseum are just as excited to see Pang Bo, a police officer from their home country's Guangzhou region. He is one of four officers from China patrolling the streets of Rome and Milan as part of an exchange program. Read more in NEWS.

Nightly Spotlight

One woman's quest for answers after a devastating diagnosis led to "MyCounterpane," an online community where people can find the emotional support.