"Some memories come with a very compelling sense of truth about them. And that happens to be the case even with memories that are not true." -- Daniel Kahneman

Memory is malleable, dynamic and elusive. When we tap into our memories, where's the line between fact and fiction? How does our memory play tricks on us, and how can we train it to be more accurate? In this hour, TED speakers discuss how a nimble memory can improve your life, and how a frail one might ruin someone else's.

Part 3 of the TED Radio Hour episode Memory Games.

About Joshua Foer's TEDTalk

Some people can memorize thousands of numbers, the names of dozens of strangers or the precise order of cards in a shuffled deck. Science writer and U.S. Memory Champion Joshua Foer shows how anyone can become a memory virtuoso, including him.

About Joshua Foer

Part 2 of the TED Radio Hour episode Memory Games.

About Daniel Kahneman's TEDTalk

Nobel laureate and founder of behavioral economics Daniel Kahneman goes through a series of examples of things we might remember, from vacations to colonoscopies. He explains how our "experiencing selves" and our "remembering selves" perceive happiness differently.

Part 1 of the TED Radio Hour episode Memory Games.

About Scott Fraser's TEDTalk

Forensic psychologist Scott Fraser studies how we remember crimes. He describes a deadly shooting and explains how eyewitnesses can create memories that they haven't seen. Why? Because the brain is always trying to fill in the blanks.

About Scott Fraser

There's been an explosion followed by the sound of gunfire in Kabul, NPR's Sean Carberry and other journalists report from the Afghan capital.

Reuters says the explosion occurred "at about 4 p.m. local time in a downtown district. ... There was no word on any casualties." The BBC reports gunfire can be heard near the headquarters of the Afghan intelligence service.

Representatives of President Bashar Assad's regime have agreed "in principle" to attend an international peace conference aimed at ending more than two years of brutal warfare in Syria, Russia's foreign ministry said Friday.

Monday's tornado in Moore, Okla., killed 24 people and caused an estimated $2.2 billion worth of damage. As the community reflects on what happened, one question is: How did so many manage to survive such devastating destruction?

Lifelong Oklahoman Kristi Freeman has seen her share of tornadoes, but she says the twister that tore through her neighborhood Monday was something else.

"This tornado was like a monster. It was like something that was alive. It destroyed your peace, your comfort," she says.

As the residents of Moore, Okla., and surrounding communities continue to recover from Monday's devastating tornado that killed at least 24 people and injured more than 375, we're keeping an eye on the news from there: