Making Sense of Intel Dispute on Russia Jet Suspicions

US intelligence suggests the Russian plane that crashed last week above the Sinai Peninsula may have been brought down by an explosive device. After meeting with Egyptian President Abdel Fattah al-Sisi today, British Prime Minister David Cameron cited the intelligence reports as the reason he cancelled British flights originating from the Egyptian resort town Sharm-el-Sheikh. Russian and Egyptian authorities have criticized that intelligence. Shane Harris is senior national security correspondent for the Daily Beast.