From DEBKAfile January 19, 2009:
The Israel air force demolished two key Hamas war systems in the first 4 minutes of its massive offensive on Gaza Saturday morning, Dec. 27, DEBKAfile's military sources report. The bombers destroyed six mosques in Gaza City which held the terrorists' biggest weapons arsenals and scores of "beehives" containing launchers primed for the simultaneous, automatic release of hundreds of powerful rockets against Israeli cities.
These launchers were rigged for precision-targeting in Israeli town centers. They were operated by a unit of 300 special Hamas operatives trained for their mission at a Syrian military bases under the instruction of Hizballah rocket specialists.
The aerial offensive knocked out 80 percent of the rockets Hamas had prepared to launch and saved Israel's southern cities. The Palestinian Islamists were left only with inferior projectiles. Therefore, 98 percent of the hundreds of missiles they managed to fire in the 22-day war missed their targets and exploded in open ground.
Answering questions about the extreme destruction wrought in Gaza and the high number of casualties – more than 1,300 - Israel commanders described combat conditions as the most complicated they had ever faced: Every second apartment building was booby-trapped and every third building concealed arms caches. Weapons were concealed under children's beds and in basements. ...Hamas gunmen by and large avoided engaging Israeli troops, relying on these death traps.
Monday, Jan. 19, the second day of the ceasefire, the second-echelon of the Hamas leadership emerged from their fortified bunkers after three weeks underground, claiming they had vanquished the Israeli enemy. The top leaders remained invisible. The homeless people picking their way through the rubble for their broken possessions were not exactly welcoming.