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If you're planning to fly in the foreseeable future, brace yourself for big changes at the airport. Here's a look at what you can and can't carry on, what to expect at security checkpoints, what happens if your flight is canceled and what long-term air security changes lie ahead.

U.S. authorities have declared a red alert --the highest alert level -- for air traffic between the United States and Great Britain. The alert level is orange for the rest of U.S. aviation. All U.S. air travelers are banned from carrying liquids and gels on board. The prohibitions will be in place until screening processes can be reassessed.

The terrorist plot that British officials thwarted this morning has resulted in long lines, flight delays and new restrictions on carry-on luggage. Guests examine the impact of the terrorist plot on air travel.

Diplomats at the United Nations seek to narrow the differences and craft a resolution to end fighting in southern Lebanon. The United States and France are working with all parties to come up with acceptable wording, including a call for a progressive Israeli withdrawal. A Friday vote is possible, but there is still a great deal of uncertainty.

A security guard at the Tops market tried to fire back at the shooter, but his fire struck body armor instead. Experts say use of body armor by mass shooters has trended up in recent years.

Experts worry a devastating wildfire in New Mexico, partly started by a controlled burn that got out of control, may create a backlash against this important forest management tool.

U.S. airports have changed the rules about what travelers are allowed to bring on planes, following news of an alleged terrorist plot targeting transatlantic flights from Britain to the United States.

Israel says it is delaying the expansion of its ground offensive in southern Lebanon. It's an effort to give the U.N. Security Council more time to come to an agreement on a cease-fire. Renee Montagne talks to Isaac Herzog, a member of Israel's Security Cabinet.

Concerns mount over Ukrainian soldiers from Mariupol in Russian hands. Joe Biden makes his first presidential trip to Asia. A disinformation expert leaves her post heading a new government board.

The U.S. Embassy warns U.S. citizens of possible terror attacks in New Delhi and Mumbai in the coming days. An e-mail from the embassy said that the attacks were believed to be planned around India's Independence Day, which falls on Aug. 15, and could be linked to al-Qaida.