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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The U.S. Drug Enforcement Administration’s second-in-command has quietly stepped down amid reporting by The Associated Press that he once consulted for a pharmaceutical distributor sanctioned for a deluge of suspicious painkiller shipments and did similar work for the drugmaker that became the face of the opioid epidemic: Purdue Pharma.
The Biden administration on Wednesday proposed new guidelines for corporate mergers, took steps to disclose the junk fees charged by landlords and launched a crackdown on price-gouging in the food industry.
Former Secretary of State Henry Kissinger made a secret trip to China to meet with leaders.
Travis King, a private 2nd Class U.S. soldier, was identified as the individual that crossed the North and South Korean border earlier this week.
Several civil rights groups are suing Florida Gov. Ron DeSantis over his new immigration laws.
A judge in Iowa temporarily blocked the state's six-week abortion ban.
A U.S. national is being held in North Korea after crossing its closely-guarded border with South Korea.
The Biden administration and major consumer technology players on Tuesday launched an effort to put a nationwide cybersecurity certification and labeling program in place to help consumers choose smart devices that are less vulnerable to hacking.
Former President Donald Trump said Tuesday that he has received a letter informing him that he is a target of the Justice Department's investigation into efforts to undo the results of the 2020 presidential election, an indication that he could soon be indicted by federal prosecutors.
A judge in Iowa has temporarily blocked the state's new six-week abortion ban from taking effect.
