This post appeared earlier today on RealMoney. Click here for a free trial, and enjoy incisive commentary all day, every day.Great to see Warren Buffett buying here. Fabulous. He has a lot of firepower. He is right to buy American. And I want to go with him, except, he's been buying for awhile, and, more important, he can be down 20% to 30% and it doesn't matter. Buffett emphasizes over and over again that he can't time the market. Over and over again, he makes the point that he is in it for the long term.