Space Shuttle thermal protection system
On February 1, 2003, the Space Shuttle "Columbia" was destroyed on reentry due to a failure of the TPS. The investigation team found and reported that the probable cause of the accident was that during launch, a piece of foam debris punctured an RCC panel on the left wing's leading edge and allowed hot gases from the reentry to enter the wing and disintegrate the wing from within, leading to eventual loss of control and breakup of the shuttle.
Charles Sumner
Sumner's radical theory of Reconstruction proposed that nothing beyond the confines of the Constitution restricted the Congress in determining how to treat the eleven defeated states, but that even that document had to be read in light of the Declaration of Independence, which he saw as an essential part of fundamental law. Not going as far as Thaddeus Stevens in seeing the seceded states as "conquered provinces," he nonetheless argued that by declaring secession, they had committed "felo de se" ("state suicide") and could now be turned into territories that should be prepared for statehood, under conditions set by the national government. He objected to Lincoln's and later Andrew Johnson's more lenient Reconstruction policies as ungenerous to the former slaves, inadequate in their guarantees of equal rights, and an encroachment upon the powers of Congress. When Andrew Johnson was impeached, Sumner voted for conviction. He was only sorry that he had to vote on each article of impeachment, for as he said, he would have rather voted, "Guilty of all, and infinitely more."