Kim Ghattas grew up in Lebanon during the civil war and covered the Middle East for the BBC for 20 years. She says events in the Mideast in 1979 set off a wave of extremism and violence that continues today. Her new book is 'Black Wave.' Also, we talk with 'Mudlark' author Lara Maiklem. She scours the edge of London's tidal River Thames in search of items that were lost to history. Among her finds: Roman pottery, medieval jug handles and a 500-year-old child's shoe.