A Shippensburg man pleaded guilty Thursday to two felony charges, including one for assaulting law enforcement officers, during the Jan. 6, 2021, attack on the U.S. Capitol.Charles Smith, 25, also entered a guilty plea for a conspiracy charge of obstructing an official proceeding.Prosecutors said Smith posted social media messages about planning to storm the building.He also participated in pushing a large metal sign frame into a defensive line of officers attempting to prevent the crowd from advancing further, prosecutors said.Smith is scheduled to be sentenced in September. Officials said he faces a statutory maximum of 20 years in prison on the conspiracy charge and an additional eight years in prison on the assault charge.