Former U.S. Secretary of State Colin L. Powell was sitting in an ambulance Thursday night after falling ill while having dinner with friends. Powell, 69, could be seen on Hopkins Avenue sitting up in an ambulance at 11 p.m. while his wife, Alma Vivian Johnson, and an aide looked on and two paramedics attended to his care. After sitting up for several moments, paramedics had him lie down inside the ambulance. The four-star general was having dinner at Campo de Fiori with a large entourage that included former President Bill Clinton and Aspen businessman Michael Goldberg. A source inside the...