These are the headlines you Need2Know:
* **Toronto Shooter Had Tumultuous Mental History:**
The parents of slain shooter Faisal Hussain went public on his history of mental illness, but officials have not yet identified his motives. The 29-year-old shot and killed two and wounded at least a dozen on Sunday. Read the details [here](https://www.cnn.com/2018/07/24/americas/toronto-shooting-investigation/index.html).
* **Umbrellas Up, Northeasterners!:**
A flash-flood warning is in effect after heavy rainfall has flooded several Pennsylvanian towns. In Scranton, certain parts of Hershey park are submerged in water. See the map [here](https://twitter.com/NWS/status/1021536276095426560).
* **Twitter War Forges Ahead:**
Following President Trump’s all-caps [Twitter](https://twitter.com/realDonaldTrump/status/1021234525626609666) threat to Iranian President Hassan Rouhani, the Iranian Foreign Minister Mohammad Javad Zarif fired back on Monday, warning the U.S. to, “BE CAUTIOUS!” Read the full subtweet from Zarif [here](https://twitter.com/JZarif/status/1021471196242735104).
* **North Korea Tunes it Down:**
Just over a month after Trump met with North Korean leader Kim Jong-un in Singapore to discuss denuclearization, the country is dismantling several ballistic missile launch sites. Stay with the story [here](https://www.theguardian.com/world/2018/jul/24/north-korea-satellite-images-show-dismantling-of-missile-test-facilities-report).
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Children’s advocacy groups including Fairplay and Common Sense Media are asking the Federal Trade Commission to investigate Google, saying the tech giant serves personalized ads to kids on YouTube despite federal law prohibiting the practice.
A Tennessee judge agreed Wednesday to temporarily block a new rule advanced by state House Republicans that banned the public from holding signs during floor and committee proceedings.
Former President Donald Trump is skipping tonight's GOP primary debate so what will the other candidates do? Political strategist Johnathan Harris weighs in.
A federal judge on Tuesday will consider whether Texas can keep a floating barrier on the U.S.-Mexico border as both the Biden administration and Mexico push to remove Republican Gov. Greg Abbott's latest hardline measure to deter migrants from crossing.
As the Biden administration makes billions of dollars available to remove millions of dangerous lead pipes that can contaminate drinking water and damage brain development in children, some states are turning down funds.
It's almost time for the first debate among Republicans competing for their party's 2024 presidential nomination. Here's all of the information on how to watch.
Canadian Prime Minister Justin Trudeau accused Facebook on Monday of putting profits over people’s safety during the emergencies created by Canada’s record wildfire season.
