That is actually quite false, U.S. Corporations depend on foreign suppliers, but the F-22/35 and B-2 programs are vastly indigenous, when compared to other programs such as the PAK-FA or J-XX programs which incorporate many foreign parts from Europe/Israel.
I think what Schumaker talked about was the fact that many engineers and scientists working in American institutes and corporations are indeed foreign born, especially Chinese and Indians. In the US, majority of the graduate students in science and engineering schools are Chinese and Indians and most of them end up staying in the US and working for American institutes. So American designs also get foreign influence since most of these people got majority of their education in their homeland. And when they designed the system, their thought process is definitely influenced by what they had been taught previously. This includes what they learned in their homeland. I have an uncle who works for NASA and one of his main projects is to develop an aerodynamic theory that he first developed when he worked as an engineer in China (Shenyang, actually). So is the US using Chinese technology? In this case, yes. And this kind of things occurs often in American scientific institutes. Many visiting scholars brought their projects with them when they came to the States and c ontinue working them. This is often the case in Biology. How do I know? I am a biochemist and I have worked with many foreign visiting scholars from all over the world (Chinese, Japanese, Danish, German, British and Australian). Many of them continue to work on their projects that they developed when they were in their home country. And many of these projects stay in our labs and have been continued even when these foreign visiting scholars have left and gone back to their own country. So yes, we borrow from others, heavily. Let's face it. This is why the US is the world leader in technology. Have you seen how many "foreign faces" in high tech companies, like Google, Intel, Apple, Microsoft, etc?
And talking about stealing/borrowing technology, both nuclear and space programs in the US are indeed German in origin. If you look at the list of all the scientists involved in these programs, most of them are Germans. And instead of taking bits and pieces, the US simply took the entire German program and moved it over to the US. Some of the most important members were actually proven Nazi war criminals. The bioligcal wepaons program in the US also borrowed a lot from Japan after WWII. When Japan was defeated, the US took all their biological weapons data (aka the unit 731, I think)
With that said, I think we should leave this topic alone...