President Trump and North Korean leader Kim Jong Un did not make a deal at their second summit. After the talks ended overnight, Mr. Trump said, "Sometimes you have to walk." The president said Kim wanted sanctions fully lifted in exchange for closing only some of its nuclear sites. Last June, they did sign commitments during their historic first summit. Retired Army Gen. Vincent Brooks, who helped coordinate the meeting in Singapore while he was commander of U.S. Forces Korea from 2016 until late last year, joins "CBS This Morning" to discuss the second summit and why it's not a diplomatic failure.