From the U.S. State Department:
The Department of State warns U.S. citizens of the risks of traveling to the Democratic Republic of the Congo (Congo-Kinshasa) (DRC). The Department strongly recommends you avoid all travel to the city of Goma and the province of North Kivu, and all but essential travel to the province of South Kivu and the Ituri region in the province of Oriental. Because of ongoing instability and violence, the Department's ability to provide consular services to U.S. citizens in these regions of the DRC is extremely limited. ...
For further information, consult the Department of State's Country Specific Information for Democratic Republic of the Congo and the current Worldwide Caution, available on the Bureau of Consular Affairs Internet website. Current information on safety and security can also be obtained by calling 1-888-407-4747 toll-free in the United States and Canada or, a regular toll line at-1-202-501-4444 for callers from other countries. These numbers are available from 8:00 a.m. to 8:00 p.m. Eastern Time, Monday through Friday (except U.S. federal holidays). Stay up to date by bookmarking our Bureau of Consular Affairs website, which contains thecurrent Travel Warnings and Travel Alerts as well as the Worldwide Caution.
U.S. State Department Warning