<span style="color: #222222;">A powerful explosion today rocked the Afghan capital, Kabul, rattling windows and sending smoke billowing from the downtown area near the U.S. Embassy. <br />''<br />''Quoting Public Health Ministry's spokesman, Wahidullah Mayar, Tolo News reports that at least 68 people were wounded. The explosion occurred as the streets in Kabul were packed with morning commuters. <br />''<br />''The attack comes as the Taliban and the United States hold talks in the Middle Eastern state of Qatar, where the terror group maintains a political office.       </span><br />