Okay, then. Atta's movements in June are not as documented as those in July and August were. The only documented Atta sightings were on:
* an unspecified date in June: Atta joined a Jim Woolards World Gym in Delray Beach, FL. I've never seen the date reported.
* June 12/13, when he and other hijackers moved into the Tara Garden condo at 10001 W. Atlantic Blvd. in Coral Springs FL.
* June 28, when he flew to Las Vegas to meet with the other three pilots. After this point, Atta's movements until his return from Spain on July 19th are fairly trackable.
So, if only five days would be required, there were numerous opportunities in early June.
1. At sometime in June, he is recalled working out in a gym.
2. He rented a safe deposit box at a BOA branch in Miami. That date is obviously subject to confirmation. I wonder if he stored some envelopes in the safe deposit box...
3. On June 12, he is reported to have been present when al-Shehhi moved into a new apartment at Delray Beach.
4. On June 13, Atta himself moves into a new apartment in Coral Springs.
5. On June 28, he flies into Las Vegas and departs on July 1.
Offhand, I see enough gaps to allow a five-day round trip to Baghdad...