INPUT ARTICLE: Article: In order to use encrypted messaging with Facebook, you'll need the Facebook Messenger mobile app installed and updated on your Android or iOS device. You can get the app from the device's app store. On iOS devices, select the App Store. On Android devices, select the Google Play Store. The Messenger app should be the first result on your list. Tap it to open it. If you see an "Install" or "Get" button on the Messenger page, tap it to install the app. You'll automatically install the latest version with the secret conversation feature. If the Messenger store page has an "Update" button, tap it to download and install the latest version. If the page just has an "Open" button, Messenger is installed and updated.

SUMMARY: Open the app store on your Android or iOS device. Search for "Facebook Messenger."' Install Messenger if it isn't yet. Tap "Update" if an update available.

In one sentence, describe what the following article is about: Look for Google Chrome on your computer and open it. The web browser will load. This will bring down the main menu. A new Google Chrome browser window will open in Incognito Mode. In this mode, the browser header toolbar may be a little darker, with a spy cartoon at the upper left corner. The main window will also state that “You’ve gone incognito.” You can also open a new incognito window by pressing Ctrl+Shift+N for Windows, Linux, and Chrome OS. For Mac, press ⌘ + Shift + N on your keyboard.
Summary: Launch Google Chrome. Click the button with three horizontal bars on the upper right corner of the browser. Click “New incognito window” from the menu.

INPUT ARTICLE: Article: Many people need even more than the average of one-half gallon, per day. The individual amount needed depends on age, physical activity, physical condition, and time of year. Never ration water unless ordered to do so by authorities. Drink the amount you need today and try to find more for tomorrow. Under no circumstances should a person drink less than one quart (four cups) of water each day. You can minimize the amount of water your body needs by reducing activity and staying cool. Safe: melted ice cubes; water drained from the water heater (if the water heater has not been damaged); liquids from canned goods such as fruit or vegetable juices; water drained from pipes.    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/c5\/Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet1.jpg\/v4-459px-Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet1.jpg","bigUrl":"\/images\/thumb\/c\/c5\/Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet1.jpg\/aid355580-v4-728px-Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet1.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"}  Unsafe: radiators; hot water boilers (home heating system); water beds (fungicides added to the water or chemicals in the vinyl may make water unsafe to use); water from the toilet bowl or flush tank; swimming pools and spas (chemicals used to kill germs are too concentrated for safe drinking but can be used for personal hygiene, cleaning, and related uses).    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/5\/55\/Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet2.jpg\/v4-459px-Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet2.jpg","bigUrl":"\/images\/thumb\/5\/55\/Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet2.jpg\/aid355580-v4-728px-Manage-Food-and-Water-While-Taking-Shelter-in-Emergencies-Step-3Bullet2.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a> (screenshot)<br>\n<\/p><\/div>"} before using it for drinking, food washing or preparation, washing dishes, brushing teeth, or making ice. In addition to having a bad odor and taste, contaminated water can contain microorganisms (germs) that cause diseases such as dysentery, cholera, typhoid, and hepatitis. If water treatment is not possible, put off drinking suspicious water as long as possible, but do not become dehydrated.

SUMMARY:
Allow people to drink according to their needs. Know which water sources are safe and which are not. Treat all water of uncertain quality