Well, that didn't look like much, but 101 was commited. She headed south-east and ran into little trouble; mostly molerats and wild mongrels. 101 was nearing that point where she wasn't sure if she was grateful for the silence or, perhaps, starting to get a bit lonely. About midway between Megaton and Rivet City she spied a building that looked in surprisingly good shape for the area.
According to the sign this was the Arlington Library. 101 decided to take a peek inside and had her first run-in with the Brotherhood of Steel.
They were quite the sight with their power armor and laser rifles, surely they had no trouble with Super Mutants. Rather than get between those hulks and the Raiders dug in deeper in the library, 101 spent a few moments talking to Scribe Yearling in the entranceway. Scribe Yearling seemed nice enough and was able to offer more precise directions to Rivet City; she asked only that 101 bring by any undamaged books she might come across. 101 thinks that once she figures out what happened to her father she could make quite a decent living as a professional scavenger. Her father... Is he even still alive? How would he have gotten past the Super Mutants? As 101 pondered these questions she soon found herself face to face with Rivet City.
Rivet City is, arguably, the most impressive settlement in the Capital Wasteland; well fortified, well populated, strategically located. 101 found herself immediately overwhelmed, but steeled herself and approached the massive behemoth ahead of her. She hadn't come this far just to turn back.